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Talanta

Title:		Harnessing the cation-pi interactions of metalated gold monolayer-protected clusters to detect aromatic volatile organic compounds
Author(s):		Adhihetty PK; Halder S; Jasinski JB; Fu XA; Nantz MH;
Address:		"Department of Chemistry, University of Louisville, Louisville, KY, 40292, USA. Department of Chemical Engineering, University of Louisville, Louisville, KY, 40292, USA. Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY, 40292, USA. Department of Chemical Engineering, University of Louisville, Louisville, KY, 40292, USA. Electronic address: xiaoan.fu@louisville.edu. Department of Chemistry, University of Louisville, Louisville, KY, 40292, USA. Electronic address: michael.nantz@louisville.edu"
Journal Title:		Talanta
Year:		2023
Volume:		20220913
Issue:
Page Number:		123915 -
DOI:		10.1016/j.talanta.2022.123915
ISSN/ISBN:		1873-3573 (Electronic) 0039-9140 (Print) 0039-9140 (Linking)
Abstract:		"The strong, non-covalent interactions between pi-systems and cations have been the focus of numerous studies on biomolecule structure and catalysis. These interactions, however, have yet to be explored as a sensing mechanism for detecting trace levels of volatile organic compounds (VOCs). In this article, we provide evidence that cation-pi interactions can be used to elicit sensitive and selective chemiresistor responses to aromatic VOCs. The chemiresistors are fitted with carboxylate-linked alkali metals bound to the surface of gold monolayer-protected clusters formulated on microfabricated interdigitated electrodes. Sensor responses to aromatic and non-aromatic VOCs are consistent with a model for cation-pi interactions arising from association of electron-rich aromatic pi-systems to metal ions with the relative strength of attraction following the order K(+) > Na(+) > Li(+). The results point toward cation-pi interactions as a promising research avenue to explore for developing aromatic VOC-selective sensors"
Keywords:		*Gold *Volatile Organic Compounds Cations Alkali metal Btex Carboxylate salt Pi-interaction Thiolate ligand;
Notes:		"MedlineAdhihetty, Prasadanie K Halder, Sujoy Jasinski, Jacek B Fu, Xiao-An Nantz, Michael H eng P42 ES023716/ES/NIEHS NIH HHS/ Netherlands 2022/09/27 Talanta. 2023 Feb 1; 253:123915. doi: 10.1016/j.talanta.2022.123915. Epub 2022 Sep 13"