Benzimidazolium-based receptors: Case of iodide–water cluster induced supramolecular chain and improved fluorometric binding of iodide involving alcoholic group
摘要:
Benzimidazolium-based receptors 1 and 2 have been designed and synthesized. Anion binding studies reveal their selective fluorescence sensing of iodide in the excited state by exhibiting greater quenching of emission of anthracene. In the ground state, they prefer to bind bromide ion. Incorporation of alcoholic -OH in 2 leads to better performance over the receptor 1. The cyclooctameric structure as constituted by inclusion water and iodide interaction leads to ID-supramolecular chain with the structure 1 in the solid state. H-1 NMR, UV-vis and fluorescence spectroscopic methods were adopted to study the anion binding behavior. (C) 2013 Elsevier B.V. All rights reserved.
Benzimidazolium-based receptors: Case of iodide–water cluster induced supramolecular chain and improved fluorometric binding of iodide involving alcoholic group
摘要:
Benzimidazolium-based receptors 1 and 2 have been designed and synthesized. Anion binding studies reveal their selective fluorescence sensing of iodide in the excited state by exhibiting greater quenching of emission of anthracene. In the ground state, they prefer to bind bromide ion. Incorporation of alcoholic -OH in 2 leads to better performance over the receptor 1. The cyclooctameric structure as constituted by inclusion water and iodide interaction leads to ID-supramolecular chain with the structure 1 in the solid state. H-1 NMR, UV-vis and fluorescence spectroscopic methods were adopted to study the anion binding behavior. (C) 2013 Elsevier B.V. All rights reserved.
A new benzimidazolium receptor for fluorescence sensing of iodide
作者:Kumaresh Ghosh、Indrajit Saha
DOI:10.1080/10610270903469773
日期:2010.5.1
A new anthracene-appended benzimidazolium-based receptor 1 has been designed and synthesised. The receptor shows selective recognition of iodide in the excited state by exhibiting quenching of emission of anthracene. In the ground state, receptor 1 shows different selectivity and prefers to bind bromide with higher binding constant value as established from NMR titration experiment. Other anions in the study indicated weak or no interaction. Hydrogen bonding and charge-charge interactions are the forces responsible for strong binding. The interaction properties of the new receptor were evaluated by 1H NMR, UV-vis and fluorescence spectroscopic methods.
Benzimidazolium-based receptors: Case of iodide–water cluster induced supramolecular chain and improved fluorometric binding of iodide involving alcoholic group
作者:Kumaresh Ghosh、Indrajit Saha
DOI:10.1016/j.molstruc.2013.03.027
日期:2013.6
Benzimidazolium-based receptors 1 and 2 have been designed and synthesized. Anion binding studies reveal their selective fluorescence sensing of iodide in the excited state by exhibiting greater quenching of emission of anthracene. In the ground state, they prefer to bind bromide ion. Incorporation of alcoholic -OH in 2 leads to better performance over the receptor 1. The cyclooctameric structure as constituted by inclusion water and iodide interaction leads to ID-supramolecular chain with the structure 1 in the solid state. H-1 NMR, UV-vis and fluorescence spectroscopic methods were adopted to study the anion binding behavior. (C) 2013 Elsevier B.V. All rights reserved.