【摘要】：基于二硝基苯醚的硫解反應(yīng)識別機(jī)制,設(shè)計合成了羥基芘甲醛為熒光基團(tuán)的探針分子8-(2,4-二硝基苯酚基)芘甲醛(PCNP),研究了PCNP緩沖溶液分散體系對H_2S的響應(yīng).未與H_2S作用時,分子內(nèi)光致電子轉(zhuǎn)移過程導(dǎo)致探針分子PCNP幾乎不發(fā)光,當(dāng)體系中存在H_2S時,PCNP發(fā)生硫解反應(yīng),光致電子轉(zhuǎn)移過程被阻斷,羥基芘甲醛發(fā)出橙色熒光.PCNP分子對H_2S響應(yīng)迅速、靈敏,0.1 mmol·L~(-1)硫化氫存在下10 min內(nèi)熒光強(qiáng)度響應(yīng)達(dá)到最大值,熒光增強(qiáng)達(dá)260倍,反應(yīng)速率常數(shù)為0.20 min~(-1),探針分子對H_2S檢測限為0.10μmol·L~(-1),并且具有良好選擇性.
[Abstract]:Based on the recognition mechanism of thiolysis of dinitrophenyl ethers, a probe molecule 8- (2o _ 4-dinitrophenol) pyrene (PCNP), was designed and synthesized to study the response of PCNP buffer solution dispersion system to H _ 2S. In the absence of H _ 2S, intramolecular photoinduced electron transfer resulted in almost no luminescence of probe molecule PCNP. When H _ 2S was present in the system, PCNP reacted with sulfur and the photoinduced electron transfer process was blocked. In the presence of 0.1 mmol L ~ (-1) hydrogen sulfide, the response of PCNP molecule to H _ 2S reached the maximum in 10 min, and the fluorescence increased by 260 times. The reaction rate constant was 0.20 min~ (-1), and the detection limit of the probe was 0.10 渭 mol L ~ (-1), and the probe had good selectivity.
【作者單位】： 中國科學(xué)院理化技術(shù)研究所光化學(xué)轉(zhuǎn)換與功能材料重點實驗室;
【基金】：國家自然科學(xué)基金(No.21233011) 國家重點基礎(chǔ)研究發(fā)展計劃(973計劃,Nos.2013CB834703,2013CB834505)資助項目~~
【分類號】：O657.3

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