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Title: Molecular interactions between carbon nanotubes and ammonium ionic liquids and their catalysis properties

Highlights: • We report interactions between multi-walled carbon nanotubes and ionic liquids. • Triethylammonium hydrogen phosphate ionic liquids are studied. • Raman spectroscopy is used to study interactions. • Morphological studies were carried out using scanning electron microscopy. • Bucky gel was used as catalyst for Michael reactions. - Abstract: A new catalytic method has been developed for the synthesis of aza/thia-Michael addition reactions of amines/thiols, which provide higher product yields. This catalyst is a combination of multi-walled carbon nanotubes (MWCNT) with triethylammonium hydrogen phosphate (TEAP) ionic liquid (IL), commonly referred to as bucky gel. In order to gain insight into the interactions involved between IL and MWCNT, we utilised Raman spectroscopy for our analysis. The interactions between MWCNT with TEAP were clearly evidenced by the increasing intensity ratios and spectral shift in the wavelength for the Raman D and G bands of MWCNT. The morphological studies of the resulting composite materials of TEAP and MWCNT (bucky gel) were carried out using scanning electron microscopy (SEM). The key advantage of using bucky gel as a catalyst is that higher product yield is obtained in reduced reaction time for Michael reactions.
Authors:
 [1] ;  [2] ;  [3] ; ; ; ;  [1] ;  [4] ;  [1] ;  [1]
  1. Plasma Bioscience Research Center/Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 139-701 (Korea, Republic of)
  2. Department of Chemistry, University of Delhi, Delhi 110007 (India)
  3. Department of Applied Sciences, ITM University, Sector-23(A), Gurgaon 122017, Haryana (India)
  4. Department of Chemistry, Kwangwoon University, Seoul, 139-701 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22420572
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 58; Conference: IFFM2013: International forum on functional materials, Jeju City (Korea, Republic of), 27-29 Jun 2013; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; AMINES; CARBON NANOTUBES; CATALYSTS; COMPOSITE MATERIALS; GAIN; GELS; HYDROGEN PHOSPHATES; LIQUIDS; MOLTEN SALTS; RAMAN SPECTROSCOPY; SCANNING ELECTRON MICROSCOPY; SPECTRAL SHIFT; SYNTHESIS; THIOLS