Photophysics of some styryl thiazolo quinoxaline dyes in organic media

Ainavarapu, Sri Rama Koti; Bhattacharjee, B.; Haram, N.S.; Das, Ranjan; Periasamy, N.; Sonawane, N. D.; Rangnekar, D. W.

doi:10.1016/s1010-6030(00)00360-9

Cited by 36 publications

(27 citation statements)

References 16 publications

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“…Bichromophoric hemicyanine dyes under the study are the series of initiators with symmetric molecular structure of a type D‐π‐A‐S‐A‐π‐D, where D and A are an electron donor and an electron acceptor, respectively, and S denotes spacer—alkyl group. The dyes display several specific properties that are similar to the properties of the other styryl dyes reported in the literature 22–25. They have a common structural feature, namely, possess an electron donor and electron acceptor moiety located on the opposite sides of a styryl double bond.…”

Section: Resultssupporting

confidence: 67%

Studies on an argon laser‐induced photopolymerization employing both mono‐ and bischromophoric hemicyanine dye—Borate complex as a photoinitiator. Part III

Jędrzejewska

Urbański

2010

J of Applied Polymer Sci

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Two series of homodimeric hemicyanine dyes based on 4-(p-N,N-dialkylaminostyryl)pyridinium and 4-(p-N,N-dialkylaminostyryl)quinolinium residues have been evaluated as novel photoinitiators for radical polymerization induced with an argon ion laser visible emission. In the tested photoredox pairs, hemicyanine dye cation acts as an electron acceptor and it is coupled with n-butyltriphenyl borate anion being an electron donor. The photochemistry of the series of bichromophoric stilbazolium borates, 1,3-, 1,5-, and 1,10-bis-[4-(p-N,N-dialkylaminostyryl)pyridinyl]alkane di-n-butyltriphenylborates and 1,3-, 1,5-, and 1,10-bis-[4-(p-N,N-dialkylaminostyryl) quinolinyl]alkane di-n-butyltriphenylborates, was compared with the photochemistry of the structurally related, monochromophoric styrylpyridinium and the styrylquinolinium borates. The experimental results indicated that the rate of photopolymerization depends on DG el of the electron transfer between borate anion and hemicyanine cation. The relationship between the rate of polymerization and the free energy of activation shows the dependence predicted by the classical theory of the electron transfer.

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Section: Resultssupporting

confidence: 67%

Studies on an argon laser‐induced photopolymerization employing both mono‐ and bischromophoric hemicyanine dye—Borate complex as a photoinitiator. Part III

Jędrzejewska

Urbański

2010

J of Applied Polymer Sci

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“…The benzothiazole‐based cyanine dyes studied display several specific properties that are similar to the properties of other monomethine dyes reported in literature 16–19. They have a common structural feature, namely, they possess an electron‐donor and electron‐acceptor moieties located on the opposite sides of the monomethine bond.…”

Section: Resultssupporting

confidence: 67%

Development of new heterobicationic monomethine dyes as effective photoinitiator of free radical polymerization in visible‐light region

Kabatc

Kaczorowska

Jędrzejewska

et al. 2008

J of Applied Polymer Sci

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ABSTRACT:The dye initiators consisting of N-[3-(palkylpyridine)propyl]-2-[N-(3-bromopropyl)quinoline]-2-methylenebenzotiazolium diiodides as chromophores and n-butyltriphenylborate anion as electron donor were prepared to achieve an efficient photoinitiator of free radical polymerization in a visible-light region. The relative photoinitiating efficiencies of novel photoinitiators of vinyl monomers polymerization were evaluated. The results obtained clearly documented that the bicationic photoinitiators exhibit a marked increase in the photoinitiation ability compared to the initiators consisting of a single charged hemicyanine dye.

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“…Nevertheless, the deviation from an ideal linear correlation indicates that other interactions with the solvent, most likely hydrogen bonding, also contribute to the stabilization or destabilization of the ground and excited state. Similar solvatochromic behavior is well-known for structurally related dyes, especially for hemicyanine dyes bearing amino-type substituents in the styryl fragment (45)(46)(47)(48)(49). No fluorescence was detected for the solutions of compound 4b at room temperature, presumably due to a very efficient non-radiative deactivation of the exitedstate.…”

Section: Absorption and Emission Properties Of Styryl Derivatives 1à4supporting

confidence: 69%

Interaction of Crown Ether‐Annelated Styryl Dyes with Double‐Stranded DNA

Berdnikova

Федорова

Tulyakova

et al. 2015

Photochem & Photobiology

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DNA-binding properties of 15-crown-5-derived mono- and bis-styryl dyes were investigated in the presence of calf thymus DNA. To access the factors that influence the DNA association in the series of these ligands, the structure of the molecules was varied by either changing size of the heterocyclic moiety or altering the position of the styryl substituents. The major binding mode for the monostyryl dyes is intercalation. Notably, binding of the dyes to the nucleic acids leads to a fluorescence enhancement by a factor of up to 54. Therefore, these cationic styryl derivatives may be applied as fluorescent "light-up" probes for DNA detection.

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Photophysics of some styryl thiazolo quinoxaline dyes in organic media

Cited by 36 publications

References 16 publications

Studies on an argon laser‐induced photopolymerization employing both mono‐ and bischromophoric hemicyanine dye—Borate complex as a photoinitiator. Part III

Studies on an argon laser‐induced photopolymerization employing both mono‐ and bischromophoric hemicyanine dye—Borate complex as a photoinitiator. Part III

Development of new heterobicationic monomethine dyes as effective photoinitiator of free radical polymerization in visible‐light region

Interaction of Crown Ether‐Annelated Styryl Dyes with Double‐Stranded DNA

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