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Chromic Phenomena

Chromic Phenomena

Peter Bamfield | Michael Hutchings

(2018)

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Book Details

Abstract

Chromic or colour related phenomena are produced in response to a chemical or physical stimulus. This new edition will update the information on all those areas where chemicals or materials interact with light to produce colour, a colour change, or luminescence especially in the imaging, analysis, lighting and display areas. The book has been restructured to show greater emphasis on applications where 'coloured' compounds are used to transfer energy or manipulate light in some way therefore reducing the details on classical dyes and pigments.

In the past eight years, since the previous edition, there has been a remarkable increase in the number of papers and reviews being produced reflecting the growth of interest in this area. This ongoing research interest is matched by a large number of new technological applications gaining commercial value covering e.g. biomedical areas, energy, data storage, physical colour, bio-inspired materials and photonics. This book appeals to industrial chemists, professionals, postgraduates and as high level recommended reading for colour technology courses.


Dr Peter Bamfield has been involved in colours research and development for over 50 years. Since retiring from full time management in the colour industry, he has maintained an up to date knowledge of the subject area, especially on the newer applications, whilst acting as a freelance consultant to international companies, publishing reviews and presenting papers at colour conferences. He is a Fellow of The Royal Society of Chemistry and a Member of the Society of Dyers and Colourists. He authored a book on Research and Development Management in the Chemical and Pharmaceutical Industry (Wiley-VCH) which has now been published in three editions.

Dr Mike Hutchings spent 34 years in research functions in the UK and German chemical industry, mainly in colour-related and computer chemistry areas. For the past 7 years he has been involved in various freelance consultancy roles, some involving colour chemistry and associated businesses, but especially with the Munich company InfoChem on computer aided synthesis developments. He is a Fellow of the Royal Society of Chemistry. His latest applied chemistry interest concerns the cultivation and study of his freshly planted wood of about 2000 native British trees.


Table of Contents

Section Title Page Action Price
Cover Cover
Preface to the Third Edition v
Introduction vii
References xiv
Contents xvii
Part 1: Colour Change Phenomena and their Applications 1
Chapter 1 Introduction 3
References 7
Chapter 2 Photochromism 8
2.1 Main Chemical Classes 10
2.2 Spirobenzopyrans 10
2.3 Spironaphthoxazines 12
2.4 Benzo and Naphthopyrans (Chromenes) 14
2.5 Fulgides 18
2.6 Diarylethenes 22
2.7 Miscellaneous Photochromic Systems 28
2.7.1 Azobenzenes 28
2.7.2 Anils and Other Organic Photochromes 30
2.7.3 Multiphotochromic Molecular Systems 34
2.7.4 Inorganic Photochromes 36
2.7.5 Organic–Inorganic Hybrids, Transition Metal Complexes and Organometallics 37
2.7.6 Polymers, Matrices and Amorphous Materials 40
2.7.7 Couples with Carbon Nanomaterials 41
2.7.8 Biological Photochromes 43
2.8 Applications of Photochromic Materials 46
2.8.1 Applications in Ophthalmics 46
2.8.2 Novelty Items, Fashion, Cosmetics and Security 49
2.8.3 Molecular Photoswitches 50
2.8.4 Molecular Logic Gates, Circuits and Optical Computing 51
2.8.5 Optical Data Storage 54
2.8.6 Chemical Sensors 60
2.8.7 Biological and Medical Applications 63
2.8.8 Light-responsive Molecular Containers 67
References 67
Chapter 3 Thermochromism 75
3.1 Inorganic Thermochromism: Transition Metal Complexes and Organometallic Materials 75
3.2 Reversible Intrinsically Thermochromic Organic Systems 77
3.2.1 Molecular Rearrangements 77
3.2.2 Stereoisomerism 78
3.2.3 Macromolecular Systems 80
3.3 Reversible Indirect Thermochromic Systems 84
3.3.1 Composite Thermochromic Pigments 85
3.3.2 Chromogenic Gels 87
3.4 Commercial Applications of Thermochromic Materials 88
3.4.1 Paints, Plastics, Inks and Textiles 88
3.4.2 Architectural Uses 90
References 92
Chapter 4 Ionochromism: Halochromism, Acidochromism and Metallochromism 96
4.1 Halochromic and Acidochromic Compounds 96
4.1.1 Phthalides 97
4.1.2 Leuco Di- and Triarylmethanes 98
4.1.3 Fluorans 99
4.1.4 Azo and Styryl Dyes 99
4.2 Metallochromic Materials 100
4.2.1 Metallochromism in Chelates and Crown Ethers 100
4.2.2 Chromogenic Anion Sensors and Metallochromism 102
4.3 Applications of Ionochromism and Sub-chromisms 106
4.3.1 Analytical Chemistry 107
4.3.2 Absorbance Based Ion-selective Optical Sensors 108
4.3.3 Carbonless Copying Paper 111
4.3.4 Direct Thermal Printing 112
4.3.5 Functional Textile Sensors 114
References 114
Chapter 5 Electrochromism 117
5.1 Electrochromic Cells 117
5.2 Electrochrome Types 119
5.2.1 Solution Electrochromes (Type-I) 119
5.2.2 Solution-solid Electrochromes (Type-II) 119
5.2.3 Solid Electrochromes (Type-III) 119
5.3 Electrochromic Chemicals 120
5.3.1 Inorganic Oxides 120
5.3.2 Prussian Blue and Metal Hexacyanometallates 122
5.3.3 Metal Phthalocyanines 122
5.3.4 Viologens (4,40-Bipyridylium Salts) 123
5.3.5 Polymeric Electrochromes 125
5.3.6 Other Organic Electrochromes 130
5.3.7 Metal Oxide Nanocrystals – Plasmonic Electrochromism 130
5.3.8 Graphene and Related Polycyclic Aromatic Hydrocarbons 131
5.4 Applications of Electrochromism 132
5.4.1 Auto-dimming Rear-view Mirrors 133
5.4.2 Dimmable Aircraft and Automobile Windows 135
5.4.3 Smart Architectural Windows – Chromogenic Glazing 135
5.4.4 Photoelectrochromic/Photovoltachromic Windows 138
5.4.5 Flexible EC Devices in Solar Protection 140
5.4.6 Flexible EC Displays 141
5.4.7 Flexible ECs in Smart Textiles 143
5.4.8 Bioelectrochromic Devices 146
References 147
Chapter 6 Gasochromism 152
6.1 Windows and Reflective Mirrors 152
6.2 Gasochromic Hydrogen Sensors 154
6.3 Colorimetric Redox Based Gas Sensors 155
References 158
Chapter 7 Solvatochromism 160
7.1 Solvent Polarity and Solvatochromic Shifts 160
7.2 Solvatochromic Materials 163
7.3 Applications of Solvatochromism 164
7.3.1 Analysis of Liquids 165
7.3.2 Solvatochromic Probes 166
References 167
Chapter 8 Vapochromism 168
8.1 Vapochromic Materials 168
8.2 Vapochromic Sensors for VOCs and Their Applications 170
References 172
Chapter 9 Mechanochromism 174
9.1 Piezochromism 174
9.2 Tribochromism 176
9.3 Applications of Mechanochromism 176
References 177
Chapter 10 Chromic Phenomena via Aggregation 179
10.1 Excitonic Coupling and Aggregation 179
10.2 Aggregachromism 180
10.3 Crystallochromism 184
10.4 Excitonic Effects in Nature 186
References 187
Chapter 11 Miscellaneous Chromisms 189
11.1 Amorphochromism 189
11.2 Chronochromism 190
11.3 Radiochromism 192
11.4 Magnetochromism 193
11.5 Biochromism 196
11.6 Hydrochromism 196
11.7 Cryochromism 200
References 201
Chapter 12 Colour Change and Nanoplasmonics 203
12.1 Plasmonic Metallic Nanoparticles 203
12.1.1 Properties of Noble Metal Nanoparticles 206
12.2 Colour Change Applications of Metallic Nanoparticles 209
12.2.1 Colorimetric Sensors Based on Metallic Nanoparticles 209
12.2.2 Colorimetric Nanoparticle Biosensors 209
12.2.3 Plasmonic Chromisms 212
12.2.4 Other Applications of NMNPs 218
References 218
Chapter 13 Electrophoretic Displays 221
References 224
Part 2: Luminescent Materials and their Applications 225
Chapter 14 Introduction 227
Chapter 15 Photoluminescence 229
15.1 Photoluminescent Chromophores – Organic Fluorophores 231
15.1.1 Traditional Molecular Fluorophores 233
15.1.2 Fluorescent Proteins 241
15.1.3 Aggregation Induced Emission 245
15.1.4 Fluorescent Polymers 249
15.1.5 Fluorescent Dyes and Polymers in Nanoparticles 251
15.2 The Triplet State – Organic Phosphorescence and Persistent Luminescence 253
15.2.1 Persistent Luminescence of Organics 257
15.3 Photoluminescent Semi-conductors 258
15.3.1 Quantum Dots 258
15.3.2 Perovskites 261
15.3.3 Carbon 263
15.3.4 Silicon 264
15.4 Photoluminescence from Metals and Metal Ions 264
15.4.1 Metal Clusters 264
15.4.2 d-block Transition Metal Ion Complexes 266
15.4.3 Rare Earth Ions 267
15.4.4 Metal–Organic Frameworks 268
15.5 Inorganic Photoluminescent Pigments – Phosphors 270
15.5.1 Phosphor Materials 271
15.5.2 Phosphor Applications 273
15.5.3 Phosphors in Cathode Ray Tubes – Cathodoluminescence 274
15.5.4 Persistent Luminescence 275
15.6 Up-conversion and Up-converters 278
15.6.1 Rare Earth Ion Up-converters 278
15.6.2 Hot-band Excitation – Optical Cryocooling 280
15.6.3 Triplet–Triplet Annihilation 283
15.6.4 Multi-photon Absorbers 285
15.7 Quantum Cutters – Down-conversion 290
15.8 Fluorochromisms and Chromic Luminescence 291
15.8.1 Electrofluorochromism 292
15.8.2 Mechanofluorochromism 296
15.8.3 Vapofluorochromism and Solvatofluorochromism 302
15.8.4 Other Fluorochromisms 303
15.9 Summary of Photoluminescent Molecules and Materials 303
15.10 Photoluminescent Probes and Imaging 304
15.11 Whole Body In Vivo Imaging 308
15.11.1 Fluorescence-guided Surgery 313
15.11.2 Imaging via Persistent Luminescent Inorganic Phosphors 316
15.12 Super-resolution Imaging 317
15.12.1 STED 317
15.12.2 PALM and STORM 320
15.12.3 SOFI 322
15.12.4 Fluorescent Biosensors for Single Molecule Counting 322
15.13 Luminescent Materials and Molecules as Cell Probes and for Cell Imaging 324
15.13.1 Molecular Beacons 332
15.13.2 Applications of Fluorescent Proteins 334
15.13.3 Physical Properties within Cells 336
15.13.4 Tumour Hypoxia 339
15.14 Luminescent Materials and Molecules for Extracellular Biomedical Analysis 340
15.14.1 Wound pH 340
15.14.2 Blood Analysis 340
15.14.3 Commercial Blood Analyte Sensors 343
15.15 Luminescent Molecules and Materials for Non-bio Analysis 343
15.15.1 Oxygen Sensing 343
15.15.2 Pressure Sensitive Paints in Aerodynamics 344
15.15.3 Marine Sciences 344
15.15.4 Detection of Explosives 346
15.15.5 Detection of Other Vapours – \"Vapofluorochromism 349
15.15.6 Securities and Anti-counterfeiting 351
15.15.7 Environmental Contaminants of Inland and Marine Waters 353
References 353
Chapter 16 Chemiluminescence 366
16.1 Chemiluminescent Reactions 366
16.1.1 Luminol Oxidation 366
16.1.2 Acridinium Compounds 368
16.1.3 Dioxetanes 368
16.2 Chemiluminescence Applications 370
16.2.1 Chemiluminescent Analysis 370
16.2.2 Chemiluminescent Lighting 372
References 372
Chapter 17 Bioluminescence 374
17.1 Bioluminescent Reactions 374
17.1.1 Firefly Bioluminescence and D-luciferin 375
17.1.2 Marine Bioluminescence and Coelenterazine 375
17.2 Applications of Bioluminescence 377
17.2.1 ATP Determination 377
17.2.2 Bioluminescence for In Vivo Imaging 378
References 380
Chapter 18 Electrochemiluminescence 381
18.1 The Chemistry of Electrochemiluminescence 381
18.2 Analytical Technology Based on Electrochemiluminescence 384
18.2.1 DNA Detection 384
18.2.2 Functional Nucleic Acid Sensors – Aptamers 385
18.2.3 Immunoassays 386
References 387
Chapter 19 Electroluminescence 388
19.1 Light Emitting Diodes (LED) 390
19.1.1 Coloured LEDs 391
19.1.2 White LEDs – Lighting and Displays 392
19.1.3 Inorganic LEDs Going Forward 394
19.1.4 Micro-LEDs 394
19.1.5 QD LEDs 395
19.1.6 Perovskite LEDs 395
19.1.7 Other New Approaches to Self-shade White LEDs 397
19.2 Organic Light Emitting Diodes (OLED) 398
19.2.1 Small Molecule OLEDs 400
19.2.2 Polymer OLEDs 401
19.2.3 Phosphorescent OLEDs – The Second Generation 403
19.2.4 TADF and ''Hot Exciton'' OLEDs – The Third Generation 405
19.2.5 White OLEDs 407
19.2.6 OLEDs as Commercial Sources of Lighting 411
19.2.7 OLEDs in Displays 412
19.2.8 Medical Applications of OLEDs 413
19.3 Light-emitting Electrochemical Cells (LEC) 414
References 416
Chapter 20 Mechanoluminescence 420
References 423
Chapter 21 Incandescence 425
Reference 426
Part 3: Light Processing Materials in Biomedical, Energy and Other Applications 427
Chapter 22 Introduction 429
Reference 431
Chapter 23 Near-Infrared Absorbers and Their Applications 432
23.1 Organic and Organometallic Near-infrared Absorbers 434
23.1.1 Polymethines (Cyanines) 434
23.1.2 Squaraines and Croconium Dyes 437
23.1.3 Iminium Salts 439
23.1.4 Triphenylmethanes 439
23.1.5 Nickel Dithiolenes 440
23.1.6 Quinones and Indoanilines 441
23.1.7 Rylenes, Other Polycyclic Hydrocarbons and Perylenes 442
23.1.8 Phthalocyanines, Porphyrins and Analogues 444
23.1.9 Donor–Acceptor Extended Conjugated Molecules 449
23.1.10 Conjugated Polymers 450
23.2 Inorganic Near-infrared Absorbers 452
23.3 Applications of NIR Absorbers and Other Laser Addressable Compounds 452
23.3.1 Thermal Energy Conversion 453
23.3.2 Protection from IR Radiation and Camouflage 457
23.3.3 Security Outlets 459
References 459
Chapter 24 Optical Data Storage 464
24.1 Magneto-Optic and Phase Change Media 464
24.2 Optical Data Storage Using Dyes 466
24.2.1 Recordable Media 466
24.2.2 Dye Requirements 467
24.2.3 Dye Classes 468
24.2.4 Dyes for High Density Recording Media 469
24.3 Developments in Optical Data Storage 470
References 471
Chapter 25 Organic Photoconductors 472
25.1 Charge Generation Materials 475
25.1.1 Azo Pigments 475
25.1.2 Phthalocyanines 476
25.1.3 Other CGMs 477
25.2 Charge Transport Materials 478
References 479
Chapter 26 Photosensitisers 480
26.1 Applications of Photosensitisers 482
26.1.1 Generation of Singlet Oxygen for Synthetic Applications 482
26.1.2 Photosensitisers on Nanoparticles, Films and Fibres 483
References 485
Chapter 27 Photosensitisers in Medicine and Chemical Biology 487
27.1 Photomedicine 489
27.2 Photodynamic Therapy (PDT) 489
27.2.1 Mechanism of PDT 490
27.2.2 Light Sources for PDT 492
27.2.3 Photosensitisers for PDT 492
27.2.4 Second Generation 494
27.2.5 Third Generation 497
27.2.6 Targeted Delivery 502
27.2.7 Photodynamic Molecular Beacons 505
27.3 Photothermal Therapy 506
27.3.1 Inorganic Photothermal Agents 507
27.3.2 Organic Photothermal Agents 509
27.4 Phototheranostics 510
27.5 Phototherapy Using Nitric Oxide 514
27.6 Photoinactivation of Microbes, Viruses and Parasites 516
27.6.1 Photobactericides 516
27.6.2 Photoantivirals 520
27.6.3 Photodynamic Inactivation of Fungi 520
27.7 Other Applications of Photodynamic Inactivation 521
27.7.1 Decontamination of Blood 521
27.7.2 Photodynamic Treatment of Blood Borne Parasites 522
27.7.3 Photoinsecticides 523
27.7.4 Photodecontamination in Non-medical Areas 525
References 526
Chapter 28 Solar Energy Utilisation 533
28.1 Solar Cells and Electrical Energy 534
28.2 Photovoltaic Cells – Materials and Construction 535
28.2.1 Single Junction Wafer Based Photovoltaics 539
28.2.2 Multi-junction II–V Wafer Solar Cells 539
28.2.3 Commercial Thin Film Solar Cells 542
28.3 Emerging Third-generation Technologies 543
28.3.1 Organic Photovoltaics (OPVs) 543
28.3.2 Polymer Based Solar Cells (PSCs) 545
28.3.3 Small Molecule Based Solar Cells 549
28.3.4 Quantum Dot Solar Cells 551
28.3.5 Dye Sensitised Solar Cells (DSSCs) 553
28.3.6 Quantum Dot Sensitised Solar Cells (QDSSCs) 561
28.3.7 Perovskite Solar Cells 561
28.3.8 Plasmonics in Photovoltaic Applications 565
28.3.9 Applications of Photovoltaics in Architecture, Transport, Fashion and Design 567
28.4 Artificial Photosynthesis 570
28.4.1 Artificial Light Harvesting Antenna 571
28.4.2 Artificial Reaction Centres 575
28.4.3 Artificial Reaction Centre-Antenna Couples 576
28.4.4 Transmembrane Pumping 576
28.5 The Production of Useful Chemicals and Fuels Using Solar Energy 578
28.5.1 Water Splitting 579
28.5.2 Carbon Dioxide Photoreduction 589
References 591
Chapter 29 Conversion of Light into Kinetic Energy 599
29.1 Light-activated Molecular Tweezers 600
29.2 Light Driven Rotors 600
29.3 Photoinduced Molecular Shuttles 603
29.4 Applications of Light Driven Molecular Machines 605
References 607
Part 4: Light Manipulation Materials, Structural Colours and Photonics 609
Chapter 30 Introduction 611
Chapter 31 Liquid Crystal Materials and their Uses 612
31.1 Nematic Liquid Crystals and Their Applications 613
31.1.1 Nematic LC Displays 614
31.1.2 Nematic Liquid Crystal Materials 618
31.1.3 Colour Filters for Displays 620
31.2 Cholesteric/Chiral Nematic Liquid Crystals and Their Applications 622
31.2.1 Cholesteric Liquid Crystal Displays, Memory Panels and Electronic Paper 623
31.2.2 Sensing Applications 627
31.2.3 Protective Eyewear 629
31.2.4 Polymeric Cholesteric Liquid Crystals and Colour 630
31.2.5 Chiral Dopants as Light Driven Molecular Switches 633
31.3 Polymer-Dispersed Liquid Crystals 634
31.4 Polymer Stabilised Blue Phase LCs 635
31.5 Side Chain Polymeric Liquid Crystals 636
References 638
Chapter 32 Colours from Physical Effects 641
32.1 Lustre and Colour Variable Pigments 642
32.1.1 Optical Basis of Pigments Based on Interference and Diffraction 642
32.1.2 Materials, Construction and Processes 643
32.1.3 Applications of Lustre/Colour Variable Pigments 646
32.2 Interferometric Modulator (IMOD) Technology 647
32.3 Iridescent Fibres 649
32.4 The Blackest Blacks – High Absorption and Low Reflection 649
32.5 Bioinspired Photonic Structures 651
32.5.1 Structural Colours in Nature 651
32.5.2 Biomimetic Templates for Photonic Structures 653
32.5.3 Colloidal Self-assembly of Photonic Crystals/Inverse Opals 656
32.5.4 Top-down Routes to Photonic Structures 659
32.5.5 Photonic Crystals Exhibiting Chromisms and their Applications 659
32.6 Plasmonic Structural Colour 669
32.6.1 Plasmonic Nanostructures 670
32.6.2 Plasmonic Colour Printing 673
32.6.3 Plasmonic Reflective Displays 676
32.6.4 Plasmonic Colour in Electronic Paper 676
32.6.5 Other Applications 677
References 679
Chapter 33 Holography 685
33.1 Principles of Holography 685
33.1.1 Full Colour Holography 686
33.2 Materials Used in Holography 687
33.2.1 Photopolymers in Holography 688
33.2.2 Rewritable Holographic Media 690
33.3 Applications of Holography 694
33.3.1 Holographic Data Storage 694
33.3.2 Holographic Imaging Applications in Security 697
33.3.3 3D Displays 697
33.3.4 Holographic Sensors and Chromisms 698
References 702
Chapter 34 Laser Diodes 705
34.1 Organic Lasers 705
34.1.1 Small Fluorescent Dyes 707
34.1.2 Luminescent Linear Conjugated Polymers 708
34.1.3 Conjugated Dendrimers 709
34.1.4 Liquid Crystal Lasers 711
34.1.5 Colloidal Photonic Crystal Lasers 712
References 714
Chapter 35 Nonlinear Optics 716
35.1 Basis of Nonlinear Optics 716
35.2 Nonlinear Optical Materials 717
35.2.1 Design Principles for D–π–A NLO Chromophores 718
35.2.2 Ionic Chromophores 719
35.2.3 Twisted p-electron Systems 720
35.2.4 Metal Complexes 721
35.2.5 Dendrimers and Poled Polymers 722
35.2.6 Polymethines and All Optical Signal Processing 722
35.2.7 Octupolar Chromophores 725
35.2.8 Multi-photon Absorbing Dyes 725
35.2.9 Reverse Saturable Absorbers – Optical Limiting 727
References 728
Chapter 36 Photorefractive Polymers 730
36.1 Applications of Photorefractive Materials 733
References 733
Appendix 1 Organic Chromophores used as Commercial Dyes and Pigments 734
A1.1 Structural Classes used as Dyestuffs 735
A1.1.1 Azo Dyestuffs 736
A1.1.2 Cyclic and Polycyclic Quinones 745
A1.1.3 Azines, Oxazines and Thiazines 749
A1.1.4 Polymethines 749
A1.1.5 Triarylcarbenium Dyes 751
A1.1.6 Phthalocyanines 751
A1.1.7 Sulfur Dyes 752
A1.2 Structural Classes used as Pigments 752
A1.2.1 Azo Pigments 752
A1.2.2 Metal Complexes 755
A1.2.3 Benzimidazolones 755
A1.2.4 Isoindolinone Pigments 756
A1.2.5 Phthalocyanines 756
A1.2.6 Quinacridones 758
A1.2.7 Perylenes and Perinones 759
A1.2.8 Polycyclic Quinones 760
A1.2.9 Diketo-pyrrolopyrroles 761
A1.2.10 Triarylcarbeniums 761
A1.3 Solvent Dyes 761
References 763
Appendix 2 Increase in the Number of Relevant Scientific Publications 765
References 768
Subject Index 769