Corrole-BODIPY dyads: Synthesis, structure, and electrochemical and photophysical properties

Biju Basumatary, Adiki Raja Sekhar, R. V. Ramana Reddy, Jeyaraman Sankar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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 1H 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.

Original languageEnglish
Pages (from-to)4257-4267
Number of pages11
JournalInorganic Chemistry
Issue number9
StatePublished - 4 May 2015
Externally publishedYes


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