Abstract
Spectral properties and photophysical processes in two macroheterocycles consisting of two pairs of chemically bound fluorophors 1-(3,4-dicyanophenyl)-benzotriazole and 9,10-bis (4-aminophenyl)-anthracene (MI) and 1-(3,4- dicyanophenyl)-benzotriazole and rhodamine (MII) are examined by quantum-chemical and experimental methods. It is demonstrated that macroheterocycles are not bifluorophor molecules in classical understanding by virtue of their unique structure. All processes of electronic excitation energy deactivation in such systems proceed as in a single molecule, and electronic states in them are common with different relative contributions of molecular orbitals belonging to donor and acceptor fragments. The presence of identical fragments results in splitting of electronic states with the forbidden lower state from which the fluorescence is improbable.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 10, pp. 13–18, October, 2004.
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Kopylova, T.N., Samsonova, L.G., Gadirov, R.M. et al. Investigation of photoprocesses in complex molecular systems (macroheterocycles). Russ Phys J 47, 976–982 (2004). https://doi.org/10.1007/s11182-005-0010-8
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DOI: https://doi.org/10.1007/s11182-005-0010-8