Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals

The scientific investigation based on the molecular design of aromatic compounds for high-performance chemosensor is challenging. This is because their multiplex interactions at the molecular level should be precisely determined before the desired compounds can be successfully used as sensing materi...

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Main Authors: Matmin, J., Ghazalli, N. F., Razak, F. I. A., Jalani, M. A.
Format: Conference or Workshop Item
Published: 2021
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Online Access:http://eprints.utm.my/id/eprint/95087/
http://dx.doi.org/10.4028/www.scientific.net/SSP.317.202
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spelling my.utm.950872022-04-29T22:02:13Z http://eprints.utm.my/id/eprint/95087/ Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals Matmin, J. Ghazalli, N. F. Razak, F. I. A. Jalani, M. A. QD Chemistry The scientific investigation based on the molecular design of aromatic compounds for high-performance chemosensor is challenging. This is because their multiplex interactions at the molecular level should be precisely determined before the desired compounds can be successfully used as sensing materials. Herein, we report on the molecular design of chemosensors based on aromatic structures of benzene as the organic motif of benzene-1,3,5-tricarboxamides (BTA), as well as the benzene pyrazole complexes (BPz) side chain, respectively. In the case of BTA, the aromatic benzene acts as the centre to allow the formation of π–π stacking for one-dimensional materials having rod-like arrangements that are stabilized by threefold hydrogen bonding. We found that when nitrate was applied, the rod-like BTA spontaneously formed into a random aggregate due to the deformation of its hydrogen bonding to form inactive nitroso groups for non-optical sensing capability. For the optical chemosensor, the aromatic benzene is decorated as a side-chain of BPz to ensure that cage-shaped molecules make maximum use of their centre providing metal-metal interactions for fluorescence-based sensing materials. In particular, when exposed to benzene, CuBPz displayed a blue-shift of its original emission band from 616 to 572 nm (Δ = 44 nm) and emitted bright orange to green emission colours. We also observe a different mode of fluorescencebased sensing materials for Au-BPz, which shows a particular quenching mechanism resulting in 81% loss of its original intensity on benzene exposure to give less red-orange emission (λ = 612 nm). The BTA and BPz synthesized are promising high-performance supramolecular chemosensors based on the non-optical and optical sensing capability of a particular interest analyte. 2021 Conference or Workshop Item PeerReviewed Matmin, J. and Ghazalli, N. F. and Razak, F. I. A. and Jalani, M. A. (2021) Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals. In: 7th International Conference on Solid State Science and Technology, ICSSST 2019, 11-13 Nov 2019, Putrajaya, Malaysia. http://dx.doi.org/10.4028/www.scientific.net/SSP.317.202
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic QD Chemistry
spellingShingle QD Chemistry
Matmin, J.
Ghazalli, N. F.
Razak, F. I. A.
Jalani, M. A.
Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals
description The scientific investigation based on the molecular design of aromatic compounds for high-performance chemosensor is challenging. This is because their multiplex interactions at the molecular level should be precisely determined before the desired compounds can be successfully used as sensing materials. Herein, we report on the molecular design of chemosensors based on aromatic structures of benzene as the organic motif of benzene-1,3,5-tricarboxamides (BTA), as well as the benzene pyrazole complexes (BPz) side chain, respectively. In the case of BTA, the aromatic benzene acts as the centre to allow the formation of π–π stacking for one-dimensional materials having rod-like arrangements that are stabilized by threefold hydrogen bonding. We found that when nitrate was applied, the rod-like BTA spontaneously formed into a random aggregate due to the deformation of its hydrogen bonding to form inactive nitroso groups for non-optical sensing capability. For the optical chemosensor, the aromatic benzene is decorated as a side-chain of BPz to ensure that cage-shaped molecules make maximum use of their centre providing metal-metal interactions for fluorescence-based sensing materials. In particular, when exposed to benzene, CuBPz displayed a blue-shift of its original emission band from 616 to 572 nm (Δ = 44 nm) and emitted bright orange to green emission colours. We also observe a different mode of fluorescencebased sensing materials for Au-BPz, which shows a particular quenching mechanism resulting in 81% loss of its original intensity on benzene exposure to give less red-orange emission (λ = 612 nm). The BTA and BPz synthesized are promising high-performance supramolecular chemosensors based on the non-optical and optical sensing capability of a particular interest analyte.
format Conference or Workshop Item
author Matmin, J.
Ghazalli, N. F.
Razak, F. I. A.
Jalani, M. A.
author_facet Matmin, J.
Ghazalli, N. F.
Razak, F. I. A.
Jalani, M. A.
author_sort Matmin, J.
title Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals
title_short Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals
title_full Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals
title_fullStr Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals
title_full_unstemmed Supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals
title_sort supramolecular interactions in aromatic structures for non-optical and optical chemosensors of explosive chemicals
publishDate 2021
url http://eprints.utm.my/id/eprint/95087/
http://dx.doi.org/10.4028/www.scientific.net/SSP.317.202
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