Journal of Photochemistry and Photobiology A: Chemistry
Photo-initiated electron transfer reactions in dye—borate ion pairs: energy, distance and solvent dependence
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Polymerization of HEMA photoinitiated by the Safranine/diphenylborinate system
2013, Journal of Photochemistry and Photobiology A: ChemistryCitation Excerpt :Boron derivatives, especially borate anions, have proved to be efficiently electron transfer donors, and were studied as co-initiators in free radical polymerization [7,8,10,11,16]. Schuster et al. [17] reported that the irradiation with visible light of cyanine dyes in the presence of borates leads to the formation of a locally excited singlet state of the dye, that accepts an electron from the borate. The boranyl radical undergoes very fast carbonboron bond cleavage to generate a free alkyl radical.
Photophysical properties of a surfactive long-chain styryl merocyanine dye as fluorescent probe
2012, Journal of LuminescenceSpectral-luminescent and photochemical characteristics of homodimers of the styrylcyanine dye Sbt in solutions
2011, Spectrochimica Acta - Part A: Molecular and Biomolecular SpectroscopyCitation Excerpt :Therefore, the increase in solvent polarity is accompanied by a bathochromic shift of the optical absorption of ionic associates. Such pattern was previously observed for cyanine dyes in low polar solvents [11], as well as by other authors [26,27]. The most interesting situation is observed in the absorption and fluorescence spectra on passing from aqueous solutions to solutions of the binary water + dioxane solvent for dyes D-180, D-181, D-182, D-183, S-37 and S-39.
Synthesis of tetramethylammonium phenyltrialkylborate salts by the addition of alkyllithium reagents to a triorganylborane or organoboranylhalides
2011, Journal of Organometallic ChemistryCitation Excerpt :The alkyl radical formed initiates the chain polymerization of the acrylate monomer. Although studies on borate salts have appeared in the literature over the past few years, they are mostly focused on the use of tetraphenyl or alkyltriphenylborate salts [16–24]. There are only a few examples of synthesis and application of other tetravalent borates [26].
Electron transfer reactions of rigid, cofacially compressed, π-stacked porphyrin-bridge-quinone systems
2011, Coordination Chemistry ReviewsCitation Excerpt :It was found that rate constants for CS and CR in these assemblies were weakly dependent upon the number of bridging units. As underscored by the extensive literature in the area [91–111,124–126,129,165,172–187,189–197], the popularity of double-stranded DNA and related nucleobase scaffolds for interrogating issues pertinent to stacked π manifold electronic coupling derives largely from their ease of synthesis. Fabrication of π-stacked assemblies, in which interactions between cofacially aligned D, Sp, and A moieties differ radically from deoxyribonucleic acid-based systems, is inherently more challenging.
The spectral-luminescent and photochemical characteristics of several styrylcyanine dyes in solution
2011, Journal of Molecular LiquidsCitation Excerpt :The smallest bathochromic shift (from 4 to 15 nm) is observed in binary solutions 2%water + 98%dioxane, with low dielectric constant. A similar relationship was observed our earlier for cyanine dyes in little polar solutions [7], and also in the works of other authors [27,28]. The photostability study has shown that, as the light irradiates the aqueous solutions of the investigated dye, absorption intensity of the main band decreases while a new shorter wavelength bands with λmax = 350 nm develops.