Design and Synthesis of Aggregation-Caused Quenching Hydroxy-Phenanthroimidazole Derivatives for Probing of Fe3+ Ions and as Potential Blue Light Emitters

IF 3 4区 化学 Q3 CHEMISTRY, PHYSICAL
Nisha Odedara, Niteen Borane, Rajamouli Boddula
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Abstract

Fluorescence aggregated molecules tend to employ versatile opportunities in metal ion probe sensors and fluorescent lighting. To achieve this dual challenging task, currently synthesized three phenanthroimidazole-naphthalene-based compounds Pq-tBu-OH, Pq-mF-OH, and Pq-pF-OH are derived based on substitution at N1 position for better photophysical and electrochemical properties. Compared experimental and theoretical calculations define the highest bandgap to be 2.75 eV of Pq-pF-OH, and the same molecule expressed a higher (348 °C) thermal decomposition. The calculated singlet and triplet energies found in the range of 3.24–3.67 and 2.70–2.72 eV indicate well energy transfer from S1→S0 (quantum yield of 23.36 %, lifetime is 4.05 ns). Among the numerous morphologies, the solid form exhibited improved intensive deep blue emission (x=0.159, y=0.051), and its InGaN LED results demonstrated a strong deep blue emission at 418 nm. Moreover, the fluorophores were experimentally visualizing the aggregation-caused quenching (ACQ) which enables the probing of Fe3+ ion. However, for the first time, the ACQ-assisted concept is applied through synthesized molecules for Fe3+ ion probing via fluorescence spectra, Job's plot calculation, and 1H NMR results. In addition, the probe works excellently at a detection limit of 10 μM and it could also act as a potential competitor for lighting applications.

Abstract Image

设计和合成聚合引起淬火的羟基菲咯咪唑衍生物,用于探测 Fe3+ 离子并用作潜在的蓝光发射器
荧光聚合分子在金属离子探针传感器和荧光照明领域具有广泛的应用前景。为了实现这一具有双重挑战性的任务,目前合成的三种菲咯咪唑-萘基化合物 Pq-tBu-OH、Pq-mF-OH 和 Pq-pF-OH 基于 N1 位置的取代,以获得更好的光物理和电化学性能。实验和理论计算的比较结果表明,Pq-pF-OH 的最高带隙为 2.75 eV,而且同一分子的热分解温度更高(348 ℃)。计算得出的单线和三线能量范围分别为 3.24-3.67 和 2.70-2.72 eV,表明 S1®S0 的能量转移良好(量子产率为 23.36%,寿命为 4.05 ns)。在众多形态中,固体形态的深蓝色发射强度有所提高(x=0.159,y=0.051),其 InGaN LED 结果表明在 418 纳米波长处有强烈的深蓝色发射。此外,荧光团在实验中可观察到聚集引起的淬灭(ACQ),从而实现了对 Fe3+ 离子的探测。然而,通过荧光光谱、约伯图计算和 1H NMR 结果,ACQ 辅助概念首次被应用于通过合成分子探测 Fe3+ 离子。此外,该探针在 10 µM 的检测限内工作出色,也可作为照明应用的潜在竞争对手。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ChemPhotoChem
ChemPhotoChem Chemistry-Physical and Theoretical Chemistry
CiteScore
5.80
自引率
5.40%
发文量
165
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