title: meso-Aryl core-modified fused sapphyrins: syntheses and structural diversity.
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.
authors.affiliation: School of Chemical Sciences, National Institute of Science Education and Research (NISER) , Institute of Physics Campus, Sainik School P.O. Bhubaneswar 751 005, Odisha, India.
authors.forename: Ganesan
authors.initials: G
authors.lastname: Karthik
authors.forename: A
authors.initials: A
authors.lastname: Srinivasan
authors.forename: Tavarekere K
authors.initials: TK
authors.lastname: Chandrashekar