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https://hdl.handle.net/2445/159117
Title: | Influence of the attachment of a gold(I) phosphine moiety at the upper rim of a calix[4]pyrrole on the binding of tetraalkylammonium chloride salts |
Author: | Sun, Qingqing Aragay, Gemma Pinto Martínez, Andrea Aguiló Linares, Elisabet Rodríguez Raurell, Laura Ballester, Pablo |
Keywords: | Pirroles Química supramolecular Compostos d'or Pyrroles Supramolecular chemistry Gold compounds |
Issue Date: | 9-Jan-2020 |
Publisher: | Wiley-VCH |
Abstract: | We report the synthesis of an unprecedent mono-gold(I) phosphine complex based on a 'two wall' aryl-ethynyl extended calix[4]pyrrole. We describe and compare the binding properties of the parent 10α,20α-bis-aryl-ethynyl calix[4]pyrrole ligand and the prepared organometallic compound as receptors for tetraalkylammonium chloride salts in dichloromethane and acetone solutions. We describe the results of 1H NMR, UV-vis titrations and isothermal titration calorimetry (ITC) experiments in DCM and acetone solution, aiming at thermodynamically characterize the formed complexes. The obtained results indicate a noticeable decrease in the binding affinity of the chloride for the mono-gold(I) receptor 1 compared to the parent ligand 2. The increase in the negative value of the electrostatic surface potential at the center of the aromatic ring of the gold(I) meso-aryl-ethynyl substituent serves to explain the observed results and the presence in solution of the chloride complex of 1 as a mixture of two conformers. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1002/chem.201905160 |
It is part of: | Chemistry-A European Journal, 2020, vol. 26, num. 15, p. 3348-3357 |
URI: | https://hdl.handle.net/2445/159117 |
Related resource: | https://doi.org/10.1002/chem.201905160 |
ISSN: | 0947-6539 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) |
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