Infrared Absorbing Dyes

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Infrared Absorbing Dyes

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Author : Masaru Matsuoka
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29

Infrared Absorbing Dyes written by Masaru Matsuoka and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.

New laser technology has developed a new dye chemistry! Development of the gallium-arsenic semiconductor laser (diode laser) that emits laser light at 780-830 nm has made possible development of new opto-electronic systems including laser optical recording systems, thermal writing display systems, laser printing systems, and so on. Medical applications of lasers in photodynamic therapy for the treatment of cancer were also developed. In such systems, the infrared absorbing dyes OR dyes) are currently used as effective photoreceivers for diode lasers, and will become the key materials in high technology. At the present time the chemistry of IR dyes is the most important and interesting field in dye chemistry. Laser light can be highly monochromatic, very well collimated, coher ent, and, in some cases, extremely powerful. These characteristics make diode lasers a very cheap, convenient, and useful light source for a variety of applications in science and technology. For these purposes, however, IR dyes with special characteristics are required. To develop new IR dyes, it is most important to establish the correlation between the chemical structures of dyes and other characteristics of dyes, such as their absorption spectra. Molecular design of IR dyes predicting the Amax and Emax values by molecular orbital (MO) calculations is now possible even by using a personal computer, and many types of new IR dyes have been demonstrated. Also, new opto-electronic systems using IR dyes as photoreceivers have been reported recently.

Near Infrared Absorbing Dyes

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Author : K. A. Bello
language : en
Publisher:
Release Date : 1986

Near Infrared Absorbing Dyes written by K. A. Bello and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

Near Infrared Dyes For High Technology Applications

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Author : S. Daehne
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Near Infrared Dyes For High Technology Applications written by S. Daehne and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

This book summarizes the results of the NATO Advanced Research Workshop on "Syntheses, Optical Properties, and Applications of Near-Infrared (NIR) Dyes in High Technology Fields" held at Trest (Czech Republic) from September 24 to 27, 1997. It was attended by 52 scientists from 16 countries, among them 18 participants from 8 Eastern-Europe. The Workshop has been stimulated by the great progress that has been made in utilizing NIR dyes in high technology areas. This has been triggered by the availability of reliable. vel)' small, and inexpensive laser diodes emitting in the NIR region which raise the analytical detection limits by several orders of magnitude, allow time-resolved measurements for temporal discrimination between spectrally similar species, and make possible miniaturization as well as remote sensing through space and by fiber optical techniques. Furthermore, NIR dyes proved to be vel)' important in other high technology fields such as laser physics, optical recording techniques, nonlinear optics, biochemistty and medicine.

Novel Near Infrared Absorbing Dyes

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Author : Stephen Nigel Corns
language : en
Publisher:
Release Date : 1990

Novel Near Infrared Absorbing Dyes written by Stephen Nigel Corns and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.

New near-infrared absorbing donor-acceptor chromophores have been investigated by varying the electron donating and accepting strength of the two halves of the molecule within wide limits. The dihydroperimidine, perimidine, Michler's ethylene and 1-decyl-2(1H)- methyl-benz[c, d]indolium iodide residues were examined as donor residues, and these were coupled to 4-nitrobenzenediazonium chloride to give monoazo dyes. The?max values of these gave a qualitative indication of relative electron donor strengths, and the 1-ethyl-2-methylperimidine azo dyes proved to be the most bathochromic, being blue in colour. The dyes were amongst the most bathochromic monoazo dyes yet prepared containing the 4-nitrophenylazo residue. The N-alkyl-3-cyano-6-hydroxy-4-methyl-2-pyridone system was investigated as a potentially powerful electron acceptor system, and the 5-formyl and 5-nitroso derivatives were condensed with Michler's ethylene and 1-decyl-2(1H)-methyl-benz[c, d]indolium iodide to give new donor-acceptor dyes. The aza dyes prepared from the nitroso compounds proved to be the most bathochromic in accord with PMO theory and many were near-infrared absorbing. A series of near-infrared absorbing squarylium dyes with narrow, intense absorption bands at about 800nm were obtained by reacting squaric acid with 2,2-disubstituted dihydroperimidines. The first dyes of this type possessed poor organic solvent solubilities but, through modification of the 2,2-substituents of the dihydroperimidines it was possible to obtain squarylium dyes with good organic solvent solubility, this being a much sought after property of infrared dyes. Other squarylium dyes were obtained by the reaction of squaric acid with 1-ethyl-2-methylperimidine, Michler's ethylene and 1-decyl-2(1H)-methyl-benz[c, djindolium iodide. The latter two dyes absorbed in the infrared region at 809 and 900nm respectively in toluene. A modified procedure for the synthesis of croconic acid was developed, which enables the acid to be obtained in the anhydrous form readily. Reaction of croconic acid with 3-hydroxy-N, N-dialkylanilines afforded highly bathochromic dyes (? max ca. 830nm). Reaction with 1- decyl-2(1H)-methyl benz[c, d]indolium iodide gave a croconium dye that absorbed beyond 1000nm. The reaction of 8-hydroxyjulolidine with croconic acid was particularly interesting as it occurred readily at room temperature. Thus it was possible to undertake a kinetic study of mechanistic aspects of the condensation reaction between croconic acid and arylamines. The results indicated that the optimum reaction conditions involved using a low proportion of an alcohol in a nonpolar aprotic solvent in the presence of a weak acid catalyst. Dyes were also obtained from the reaction of various electrophilic chlorine-substituted compounds with electron-donor aromatic residues, thus giving new donor-acceptor dyes, several of which were nearinfrared absorbing with low molecular masses and good organic solvent solubilities. The dyes were, however, strongly coloured due to their broad absorption bands which extended well into the visible region. The thermal and photochemical stabilities of representative examples of all the infrared dye classes prepared in this work have been examined, using standard procedures.

The Synthesis And Application Of Near Infrared Absorbing Dyes In Photoelectrochemical Cells

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Author : Victoria H. M. Goddard
language : en
Publisher:
Release Date : 2006

The Synthesis And Application Of Near Infrared Absorbing Dyes In Photoelectrochemical Cells written by Victoria H. M. Goddard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Solar cells categories.

Near Infrared Absorbing Dyes For Laser Welding Of Plastic

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Author :
language : en
Publisher:
Release Date : 2013

Near Infrared Absorbing Dyes For Laser Welding Of Plastic written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

An Element Containing An Infrared Absorbing Dye

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Author : G. S. Proehl
language : en
Publisher:
Release Date : 1988

An Element Containing An Infrared Absorbing Dye written by G. S. Proehl and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.

Near Infrared Absorbing Cyanine Dyes And Organic Inorganic Perovskites For Electronic Applications

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Author : Anna C. Véron
language : en
Publisher:
Release Date : 2017

Near Infrared Absorbing Cyanine Dyes And Organic Inorganic Perovskites For Electronic Applications written by Anna C. Véron and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.

Towards Bis Benzimidazole Near Infrared Absorbing And Emitting Dyes

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Author : Tianyi Wang
language : en
Publisher:
Release Date : 2021

Towards Bis Benzimidazole Near Infrared Absorbing And Emitting Dyes written by Tianyi Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.

Capturing Lost Photons

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Author :
language : en
Publisher:
Release Date : 2020

Capturing Lost Photons written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.