Colloids and Surfaces A 538 (2018) 280–286 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Research Paper Heterogeneous polarity and surface acidity of silica-organic materials with ﬁxed 1-n-propyl-3-methylimidazolium chloride as probed by solvatochromic and ﬂuorescent dyes a a a a a I.V. Khristenko , A.V. Panteleimonov , R. Yu. Iliashenko , A.O. Doroshenko , V.V. Ivanov , a, b a O.S. Tkachenko , E.V. Benvenutti , Yu. V. Kholin V. N. Karazin Kharkiv National University, Kharkiv 61022, Ukraine Federal University of Rio Grande do Sul (UFRGS), CP 15003, Porto Alegre, RS, Brazil GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: A new silica-organic hybrid material with ﬁxed ionic liquid 1-n-propyl-3-methylimidazolium chloride has been 2 −1 Hybrid xerogel synthesized by the sol-gel method. Its speciﬁc surface area is 22 m g , average pore diameter is 8 nm and pore 3 −1 13 Probing volume is 0.05 cm g . According to the results of C NMR spectroscopy, the ﬁxed 1-n-propyl-3-methylimi- Solvatochromic indicators dazolium cationic group is bound with the siloxane framework via one SieC covalent bond. Properties of the Fluorescent indicators new material were compared with that of its analog, silica with the same
Geoderma – Elsevier
Published: Feb 15, 2019
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