57444-01-6Relevant academic research and scientific papers
Structural factors influencing the intramolecular charge transfer and photoinduced electron transfer in tetrapyrazinoporphyrazines
Novakova, Veronika,Hladik, Petr,Filandrova, Tereza,Zajicova, Ivana,Krepsova, Veronika,Miletin, Miroslav,Lenco, Juraj,Zimcik, Petr
, p. 5440 - 5446 (2014/03/21)
A series of unsymmetrical tetrapyrazinoporphyrazines (TPyzPzs) from the group of azaphthalocyanines with one peripherally attached amino substituent (donor) were synthesized, and their photophysical properties (fluorescence quantum yield and singlet oxygen quantum yield) were determined. The synthesized TPyzPzs were expected to undergo intramolecular charge transfer (ICT) as the main pathway for deactivating their excited states. Several structural factors were found to play a critical role in ICT efficiency. The substituent in the ortho position to the donor center significantly influences the ICT, with tert-butylsulfanyl and butoxy substituents inducing the strongest ICTs, whereas chloro, methyl, phenyl, and hydrogen substituents in this position reduce the efficiency. The strength of the donor positively influences the ICT efficiency and correlates well with the oxidation potential of the amines used as the substituents on the TPyzPz as follows: n-butylamine a photoinduced electron transfer in which the donor and the acceptor are connected through an aliphatic linker.
Diaminomaleonitrile derivatives and processes for preparing the same
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, (2008/06/13)
N-α-Cyanoalkyl compounds of diaminomaleonitrile represented by the formula (I) STR1 wherein R represents a straight or branched chain alkyl group having 1 to 4 carbon atoms or a phenyl group useful for producing dihydropyrazine compounds; iminonitrile compounds of diaminomaleonitrile useful as antimicrobial agents and intermediates, represented by the formula (II) STR2 wherein R is as defined above; and processes for preparing the same.
