Modulation of Twisted Intramolecular Charge Transfer Emission of 2‐(4′‐N, N‐Dimethylaminophenyl)imidazopyridines in Aqueous Cucurbit[7]uril+. Issue 16 (24th April 2018)

• Record Type: Journal Article
• Authors: Behera, Santosh Kumar; Pegu, Meenakshi; Krishnamoorthy, Govindarajan
• Is Part Of: ChemistrySelect. Volume 3:Issue 16(2018)
• Page Start: 4147
• Page End: 4155
• Publication Date: 2018-04-24
• Subjects: Proton transfer -- Photochemistry -- Photophysics -- Supramolecular Chemistry -- TICT; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201703074
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: The twisted intramolecular charge transfer (TICT) of 2‐(4′‐ N, N‐ dimethylaminophenyl)imidazopyridines (DMAPIPs) is examined in aqueous cucurbit[7]uril (CB7). The fluorescence spectral changes show the formation of a 1:1 inclusion complex between CB7 and DMAPIPs. Using the fluorescence data the association constants for DMAPIP‐CB7 complexes are also estimated. High stabilization energy obtained from DFT calculation corroborates the stability of DMAPIP‐CB7 complexes. The studies infer that imidazopyridine moiety of the DMAPIPs present inside the CB7 cavity and the dimethylamino phenyl ring is present outside in bulk water. The TICT emission is observed from both the DMAPIPs in CB7 environment too. The biexponential decay illustrated the dual emission of the DMAPIPs in aqueous CB7. Abstract : The host‐guest interaction and twisted intramolecular charge transfer (TICT) of 2‐(4′‐N, N‐ dimethylaminophenyl)imidazopyridines (DMAPIPs) is examined in aqueous cucurbit[7] uril (CB7). Studies revealed that formation of stable 1:1 inclusion complex between CB7 and DMAPIPs and the TICT emission is observed from both DMAPIPs in CB7 environment.