meso-Aryl core-modified fused sapphyrins: syntheses and structural diversity
Ganesan Karthik1, A Srinivasan, Tavarekere K Chandrashekar
1School of Chemical Sciences, National Institute of Science Education and Research (NISER) , Institute of Physics Campus, Sainik School P.O. Bhubaneswar 751 005, Odisha, India.
Abstract:
Two new, fused core-modified expanded porphyrins, sapphyrins 3 and 4, were synthesized by a simple acid-catalyzed condensation of electron-rich and rigid precursor, dithienothiophene (DTT) diol, and core-modified tripyrrane. These sapphyrins exhibit structural diversity depending upon the heteroatom present in the macrocyclic framework, where the thiophene ring is inverted in 3, while the selenophene ring in 4 exists in normal and inverted form in the free base and addition of two protons shifts the equilibrium to inverted form.
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