A PET based fluorescent chemosensor with real time application in monitoring formaldehyde emissions from plywood

Abstract

A simple, robust fluorescent chemodosimeter capable of detecting nanomolar levels of formaldehyde with applicability in monitoring formaldehyde emissions from plywood.

DFT/MRCI assessment of the excited‐state interplay in a coumarin‐schiff Mg2+ fluorescent sensor

“…In ethanol‐water solution (99:1 v/v), PyHC exhibits weak fluorescence after photoexcitation to the S 1 state . Highly efficient nonradiative processes may participate in the photophysical decay such as fast IC to the ground state, photo‐induced electron transfer (PET) from the lone pair electrons of the imine moiety (CN) to the coumarin fluorophore or isomerization of the CN bond in excited state …”

Optical chemosensors for the gas phase detection of aldehydes: mechanism, material design, and application

“…Compared to naked-eye-visual colorimetric methods, fluorometric chemosensors exhibit relatively rapid response and high sensitivity for detection of trace gaseous analytes under UV light irradiation. 34,60,96,97 According to fluorometric chemosensors for detecting aldehydes, this paper divided the reaction mechanism into four categories, including aldimine condensation, [98][99][100][101][102][103][104][105] Aza-Cope rearrangement, [106][107][108][109] QDs adjustment, 110,111 and functional MOFs interaction. 112,113 Most of these reactive fluorescent probes have been applied to detect aldehydes through the chemical reaction between -CHO group and the amine group on the probe.…”

Self-assembled amphiphilic fluorescent probe: detecting pH-fluctuations within cancer cells and tumour tissues

“…Probe CS-1 has two tertiary-nitrogen atoms (labelled as N a 0 ,b 0 in Scheme 1), at least one of which could operate as a PET-donor to suppress the uorescence intensity CS-1 in alkaline pH. In other words, in acidic medium, protonation of the nitrogen donors was expected to nullify the PET effect, 16,[42][43][44] leading to a restoration of the uorescence. Support for this proposition comes from studies of the reference compound R1 and R2 as a function of pH (range: pH 8.5 / 4.0).…”