Long Wavelength Photosensitizers for Diaryliodonium Salts Based on the 2-Benzyl-2<i>H</i>-benzo[<i>d</i>][1,2,3]triazole Skeleton

Bulut, Umut; Yilmaz, Seda; Yiğitsoy, Başak; Toppare, Levent

doi:10.1080/10601325.2012.672060

Cited by 4 publications

(4 citation statements)

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“…Phenothiazine and its derivatives are another class of efficient photosensitizers with excellent reducing properties. − In a similar manner, thioxanthones, − carbazoles, − curcumin, , quinoxaline and related structures, − and highly conjugated derivatives of thiophene ,− have been used as long wavelength photosensitizers. Moreover, several other studies have been reported on photosensitization of onium salts based on photoinduced electron transfer reactions for the initiation of cationic polymerization. ,− It was recently shown that ferrocenium salts can promote sensitization of onium salts via photoinduced electron transfer . Photoinduced electron transfer between the excited ferrocenium salt and iodonium salt resulted in the photolysis of the iodonium salt producing ferrocenium radical cations and onium radicals.…”

Section: Photoinitiation Of Chain Polymerization By Photoinduced Elec...mentioning

confidence: 99%

Photoinduced Electron Transfer Reactions for Macromolecular Syntheses

2016

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Photochemical reactions, particularly those involving photoinduced electron transfer processes, establish a substantial contribution to the modern synthetic chemistry, and the polymer community has been increasingly interested in exploiting and developing novel photochemical strategies. These reactions are efficiently utilized in almost every aspect of macromolecular architecture synthesis, involving initiation, control of the reaction kinetics and molecular structures, functionalization, and decoration, etc. Merging with polymerization techniques, photochemistry has opened up new intriguing and powerful avenues for macromolecular synthesis. Construction of various polymers with incredibly complex structures and specific control over the chain topology, as well as providing the opportunity to manipulate the reaction course through spatiotemporal control, are one of the unique abilities of such photochemical reactions. This review paper provides a comprehensive account of the fundamentals and applications of photoinduced electron transfer reactions in polymer synthesis. Besides traditional photopolymerization methods, namely free radical and cationic polymerizations, step-growth polymerizations involving electron transfer processes are included. In addition, controlled radical polymerization and "Click Chemistry" methods have significantly evolved over the last few decades allowing access to narrow molecular weight distributions, efficient regulation of the molecular weight and the monomer sequence and incredibly complex architectures, and polymer modifications and surface patterning are covered. Potential applications including synthesis of block and graft copolymers, polymer-metal nanocomposites, various hybrid materials and bioconjugates, and sequence defined polymers through photoinduced electron transfer reactions are also investigated in detail.

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Section: Photoinitiation Of Chain Polymerization By Photoinduced Elec...mentioning

confidence: 99%

Photoinduced Electron Transfer Reactions for Macromolecular Syntheses

2016

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“…Original and different cationic skeletons include dialkyl and cycloalkyl sulfonium salts, phenylethynyl sulfonium salts, acylsulfonium salts, dialkyl aryl sulfonium salts, thianthrenium salts or onium salts centered on a N (e.g., quinolinium, ammonium, anilinium salts, P (pyridinium, phosphonium salts), O (pyrilium salts) or a S atom (thiopyrilium, thiazolinium salts). Interesting results can be found in e.g., [ 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 ].…”

Section: Backgrounds: Photoinitiation Of Cationic Ropmentioning

confidence: 99%

Recent Developments of Versatile Photoinitiating Systems for Cationic Ring Opening Polymerization Operating at Any Wavelengths and under Low Light Intensity Sources

2015

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Photoinitiators (PI) or photoinitiating systems (PIS) usable in light induced cationic polymerization (CP) and free radical promoted cationic polymerization (FRPCP) reactions (more specifically for cationic ring opening polymerization (ROP)) together with the involved mechanisms are briefly reviewed. The recent developments of novel two- and three-component PISs for CP and FRPCP upon exposure to low intensity blue to red lights is emphasized in details. Examples of such reactions under various experimental conditions are provided.

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“…Several attempts have also been made for the cationic PISs under long wavelength UV lights (>300 nm) [73][74][75][76][77][78][79][80][81][82][83] or even visible lights [84][85][86][87][88][89][90][91][92][93][94]. However, photopolymerization reactions under low intensity visible light irradiation conditions were rather rare and challenging before 2011.…”

Section: Introductionmentioning

confidence: 98%