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The donor-acceptor complex derived from 2-amino-1,3-benzothiazole(ABT) and ethyl 5,6-benzocoumarin-3-carboxylate(EBCC) has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction.The crystal belongs to the monoclinic system,space group P21/c,with a = 8.6485(3),b = 7.7743(3),c = 29.1963(10) ,β = 92.0460(10)°,Z = 4,Mr = 418.45,V = 1961.79(12) 3,Dc = 1.417 g/cm3,μ = 0.199 mm-1,F(000) = 872,the final R = 0.0350 and wR = 0.1226.The complex is an A…D…D’…A’ H-bonded tetramer.The intermolecular N-H…O and N-H…N hydrogen bonds,together with π-π stacking interactions,stabilize the crystal structure by forming a supramolecular architecture.It is found that,in solid state,the fluorescence emission of the complex is quenched significantly while the UV-vis spectrum exhibits a broad band at 346 nm with shoulder,which can be attributed to the donor-acceptor complex formed.
The donor-acceptor complex derived from 2-amino-1,3-benzothiazole (ABT) and ethyl 5,6-benzocoumarin-3-carboxylate (EBCC) has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction The crystal belongs to the monoclinic system, space group P21 / c with a = 8.6485 (3), b = 7.7743 (3), c = 29.1963 (10) Mr = 418.45, V = 1961.79 (12) 3, Dc = 1.417 g / cm3, μ = 0.199 mm-1, F (000) = 872, the final R = 0.0350 and wR = 0.1226.The complex is an A D ... A ’H-bonded tetramer. The intermolecular NH ... O and NH ... N hydrogen bonds, together with π-π stacking interactions, stabilize the crystal structure by forming a supramolecular architecture. It is found that in solid state , the fluorescence emission of the complex is quenched significantly while the UV-vis spectrum exhibits a broad band at 346 nm with shoulder, which can be attributed to the donor-acceptor complex formed.