Pramanik Subhamay, Bhalla Vandana, Kumar Manoj
Department of Chemistry, UGC-Centre for Advanced Studies-II, Guru Nanak Dev University , Amritsar 143005, Punjab, India.
ACS Appl Mater Interfaces. 2015 Oct 21;7(41):22786-95. doi: 10.1021/acsami.5b04377. Epub 2015 Oct 7.
A hexaphenylbenzene (HPB)-based derivative bearing thiol groups has been designed and synthesized that undergoes aggregation-induced emission enhancement in mixed aqueous media to form rodlike fluorescent aggregates. These rodlike aggregates behave as a "not quenched" probe for the detection of silver ions and further act as reactors and stabilizers for reducing-agent-free preparation of blue luminescent silver nanoclusters at room temperature. The utilization of fluorescent supramolecular aggregates for the preparation of Ag NCs in mixed aqueous media is unprecedented in the literature. Moreover, the wet chemical method that we are reporting in the present paper for the preparation of luminescent silver nanoclusters is better than the other methods reported in the literature. Further, these in situ generated Ag NCs showed exceptional catalytic activity in the preparation of pyrroles involving cocyclization of isocyanides and terminal alkynes. Interestingly, the catalytic efficiency of in situ generated Ag NCs was found to be better than the other catalytic systems reported in the literature.
一种带有硫醇基团的基于六苯基苯（HPB）的衍生物已被设计并合成出来，它在混合水性介质中会发生聚集诱导发光增强，形成棒状荧光聚集体。这些棒状聚集体可作为检测银离子的“不猝灭”探针，并且在室温下进一步充当无还原剂制备蓝色发光银纳米簇的反应器和稳定剂。在混合水性介质中利用荧光超分子聚集体制备银纳米簇在文献中尚无先例。此外，我们在本文中报道的用于制备发光银纳米簇的湿化学方法比文献中报道的其他方法更好。此外，这些原位生成的银纳米簇在涉及异腈与末端炔烃共环化制备吡咯的反应中表现出卓越的催化活性。有趣的是，发现原位生成的银纳米簇的催化效率优于文献中报道的其他催化体系。
