Multiresponsive tetrarylethylene-based fluorescent dye with multicoloreded changes: AIEE properties, acidichromism, Al³⁺ recognition, and applications

Abstract

A novel fluorescent sensor BTAE-PA containing two tetrarylethylene (TAE) units, linked through a pyrimidine-2-amine was prepared, and its optical properties were systematically studied. BTAE-PA exhibited a typical aggregation-induced emission enhancement...

Development of a multi-responsive fluorescence switch system based on a pyrimidine functionalized tetrarylethylene compound

“…S6C/D, ESI†). These observations contrast with previous reports on 2-thiophene-substituted TAE dyes ( BTAE-PA ) 29 suggesting that substitution positions of the thiophene ring can significantly influence the photophysical properties of designed fluorochromes.…”

“…Conversely, the protonated 2-thiophene-substituted molecule ( BTAE-PA ) displayed a significant red-shift (Δ λ BTAE-PA = 111 nm). 29 The primary reason for this disparity is that upon protonation, the 3-thiophene-substituted TAE molecule ( BTAT-2-PAo ) undergoes a molecular configuration change from a photoreactive anti-parallel isomer to a non-photoreactive parallel isomer. This transformation weakens the TICT effect and ultimately leads to hypochromatic shift of the emission peak.…”

“…28 In our previous study, we fabricated an asymmetrical AIEE fluorescent sensor molecule comprising two TAE units connected by a pyrimidine-2-amine unit, which exhibited multi-stimuli-responsive characteristics and was successfully employed in security ink, acid/Al 3+ sensing, and bio-imaging. 29 Moreover, metal ions, prevalent in the environment and industrial production, spawn a myriad of environmental issues and even directly impact the normal functioning of biological processes. For example, chromium is deemed as one of the indispensable micronutrients in the human body, effectively regulating blood sugar levels and possessing a promising preventive role against cardiovascular diseases induced by high cholesterol.…”

A Simple Schiff Base Probe for Quintuplicate-Metal Analytes with Four Emission-Wavelength Responses

“…Yet, the insufficiency/surfeit of zinc ions could cause Friedreich's ataxia, Alzheimer's and Parkinson's diseases [3,4]. Similarly, excessive/deficient Cu 2+ could bring about certain neurological sickness and gastrointestinal disturbances, Fe 3+ may induce liver and kidney diseases as well as metabolism maladjustment, while Al 3+ can cause some damage to human s central nervous and immune systems [5][6][7][8]. Ag + accumulation could also cause serious consequences, such as grayish-blue skin discolorations [9].…”