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Synthesis and properties of covalently linked BF2-oxasmaragdyrin-porphyrin dyads and triad

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Title Synthesis and properties of covalently linked BF2-oxasmaragdyrin-porphyrin dyads and triad
 
Creator PAREEK, Y
RAVIKANTH, M
 
Subject BF2-oxasmaragdyrin
Porphyrin
Expanded porphyrin
Lifetime
Energy transfer
ENERGY-TRANSFER
EXPANDED PORPHYRINS
MULTIPORPHYRIN ARRAYS
SUBSTITUTED PORPHYRIN
FREE-BASE
STATE
RELAXATION
ASSEMBLIES
CHEMISTRY
DYNAMICS
 
Description Two covalently linked diphenyl ethyne bridged unsymmetrical dyads containing porphyrin and BF2-oxasmaragdyrin and Zn(II)porphyrin and BF2-oxasmaragdyrin units and one covalently linked triad containing Zn(II)porphyrin, porphyrin and BF2-oxasmaragdyrin units were synthesized by coupling appropriate functionalized macrocycles under Pd(0) coupling reaction conditions. The dyads and triad were freely soluble in common organic solvents and confirmed by ES-MS spectra. 1D and 2D NMR techniques were used to characterize the dyads and triad. Absorption and electrochemical studies of dyads and triad showed the overlapping features of the constituted macrocycles indicating that the macrocycles retain their basic features in the dyads and triad. The BF2-oxasmaragdyrin absorbs at lower energy and emits strongly in the visible region compared to porphyrin/Zn(II)porphyrin. Thus, BF2-oxasmaragdyrin acts as energy acceptor and porphyrin/Zn(II) porphyrin act as energy donor in dyads and triad. The steady state and time-resolved fluorescence studies supported an efficient energy transfer from porphyrin/Zn(II)porphyrin to BF2-oxasmaragdyrin unit in dyads and triad. (c) 2012 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-15T13:28:47Z
2014-10-15T13:28:47Z
2013
 
Type Article
 
Identifier TETRAHEDRON, 69(5)1590-1599
http://dx.doi.org/10.1016/j.tet.2012.11.100
http://dspace.library.iitb.ac.in/jspui/handle/100/15005
 
Language en