Star-Shaped ESIPT-Active Mechanoresponsive Luminescent AIEgen and Its On-Off-On Emissive Response to Cu/S.

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2019
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Abstract
Design and development of multifunctional materials have drawn incredible attraction in recent years. Herein, we report the design and construction of versatile star-shaped intramolecular charge transfer (ICT)-coupled excited-state intramolecular proton transfer (ESIPT)-active mechanoresponsive and aggregation-induced emissive (AIE) luminogen triaminoguanidine-diethylaminophenol ( ) conjugate from simple precursors triaminoguanidine hydrochloride and 4-(,-diethylamino)salicylaldehyde. Solvent-dependent dual emission in nonpolar to polar protic solvents implies the presence of ICT-coupled ESIPT features in the excited state. Aggregation-enhanced emissive feature of was established in the CHCN/water mixture. Furthermore, this compound exhibits mechanochromic fluorescence behavior upon external grinding. Fluorescence microscopy images of pristine, crystal, and crushed crystals confirm the naked-eye mechanoresponsive characteristics of . In addition, selectively sensed a Cu ion through a colorimetric and fluorescence "turn-off" route, and subsequently, the -Cu ensemble could act as a selective and sensitive sensor for S in a "turn-on" fluorescence manner via a metal displacement approach. Reversible "turn-off-turn-on" features of with Cu/S ions were efficiently demonstrated to construct the IMPLICATION logic gate function. The Cu/S-responsive sensing behavior of was established in the paper strip experiment also, which can easily be characterized by the naked eye under daylight as well as a UV lamp (λ = 365 nm).
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tharmalingam2019starshapedacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Tharmalingam, Balamurugan;Mathivanan, Moorthy;Dhamodiran, Ganesh;Saravana Mani, Kailasam;Paranjothy, Manikandan;Murugesapandian, Balasubramanian;
Journal ACS omega
Year 2019
DOI
10.1021/acsomega.9b00845
URL
Keywords
copper luminescence aggregation cluster compounds phosphorescence

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