title: Corrole-BODIPY Dyads: Synthesis, Structure, and Electrochemical and Photophysical Properties.
abstract: A free-base and its Cu(III) derivative of bichromophoric meso-β linked corrole-BODIPY dyad were synthesized and structurally characterized by single crystal X-ray diffraction (XRD). Both corrole and BODIPY fragments maintained respective ground state electronic isolation despite their connection through a single bond due to a tilted orientation as observed by XRD. This was further supported by UV-vis and cyclic voltammetric studies. The Cu(III)-metalated dyad exhibits temperature-dependent paramagnetic behavior as observed in the variable temperature (1)H NMR due to the presence of a Cu(II)-corrole-π-cation radical. Importantly, the free-base exhibits complete fluorescence quenching probably due to photoinduced electron transfer to a low lying charge separated state. Interestingly, emission was regained upon addition of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) due to the deprotonation of corrole. The "turn on" fluorescence behavior and the presence of acidic NH protons were further exploited toward basic anion sensing utility.
authors: Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore Bypass Road, Bhopal, India 462066.
authors: Biju
authors: B
authors: Basumatary
authors: Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore Bypass Road, Bhopal, India 462066.
authors: Adiki
authors: A
authors: Raja Sekhar
authors: Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore Bypass Road, Bhopal, India 462066.
authors: R V
authors: RV
authors: Ramana Reddy
authors: Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore Bypass Road, Bhopal, India 462066.
authors: Jeyaraman
authors: J
authors: Sankar