Remarkable ESIPT induced NIR emission by a selective colorimetric dibenzimidazolo diimine sensor for acetate

The ESIPT mechanism of dibenzimidazolo diimine sensor: a detailed TDDFT study

“…Recently, Goswami et al . reported that a new dibenzimidazolo diimine sensor (DDS) was designed and synthesized as fluorescence chemosensor . High sensitivity and selectivity lead DDS to be a novel colorimetric and fluorimetric acetate sensor based on the mechanism of ESIPT.…”

“…High sensitivity and selectivity lead DDS to be a novel colorimetric and fluorimetric acetate sensor based on the mechanism of ESIPT. However, the investigation on ESIPT is ambiguous because of no specific potential energy barrier in the S 1 state provided . In addition, experiments can only provide the indirect information about photochemical and photophysical properties.…”

A facile ratiometric and colorimetric azo-dye possessing chemosensor for Ni2+and AcO− detection

“…The produced precipitate was filtered and washed several times with water and dried at vacuum. Column chromatography was performed to obtain pure azo compound (1) 13 The chemosensor 1 has been obtained in 60% yield and characterised by several techniques such as IR, 1 H NMR ( Figure S1), 13 C NMR, HR-MS ( Figure S2), CHN and mass spectra. The spectral investigations gave consistent data for the structure of 1.…”

ESIPT based Hg2+and fluoride chemosensor for sensitive and selective ‘turn on’ red signal and cell imaging

“…[39][40][41] While several anion selective probes have been developed, metal cation as well as anion detection based on modulation of ESIPT has not been much explored. [42][43][44] In this context we report here the synthesis and The PDP sensor contains an acidic -OH group at the 2-position 65 with respect to diimine moiety. The location of acidic -OH group and =N-groups is such that there appears intramolecular hydrogen bonding in a six membered cyclic manner which may encourage keto-enol tautomerization (Scheme 2) at its ground state.…”