Anion recognition through hydrogen bonding by adamantane-dipyrromethane receptors
摘要:
Adamantane-dipyrromethane (AdD) receptors [di(pyrrole-2-yl)methyladamantane (1), 2,2-di(pyrrole-2-yl)adamantane (2). 1,3-bis[di(pyrrole-2-yl)methyl]adamantane (3). 2,2,6,6-tetra(pyrrole-2-yl)adamantane (4)] form complexes with F-, Cl-, Br-, AcO-, NO3-, HSO4-, and H2PO4- The association constants of the complexes were determined by H-1 NMR titrations, whereas the geometries of complexes 1 F- (2 1), 2 F- (2 1), 2 Cl- (2 1), 2 AcO- (2 1), and 4 F- (1 1) were determined by X-ray structural analysis The most stable complexes are of 2 1 stoichiometry with F- and AcO- The stability constants are in accordance with the anion basicity and the ability of AdD receptors to place the hydrogen bonding donor groups in a tetrahedral fashion around anions The binding energies of the complexes between receptors 1-4 and F- anion are calculated using quantum chemical methods The calculated results show that the solvent polarity is important for the complexation of fluoride ion with AdD receptors 1-4 (C) 2010 Elsevier Ltd All rights reserved
New adamantane-dipyrromethanes (AdD 1-4) were synthesized and their anion binding properties investigated. AdD 1-3 form 2:1 complexes with F- (AdD: F = 2:1) characterized by high association constants, and 1:1 complexes with Cl-, Br-, HSO4- and H2PO4-. The binding of Cl-, Br-, HSO4- and H2PO4- by AdD 1-3 is 2-3 times stronger than for the reference compound, ineso-phenyldipyrromethane (5). However, AdD 4 forms complexes with F- characterized by 1:1 and 1:2 stoichiometry (AdD:F = 1:2). (C) 2007 Elsevier Ltd. All rights reserved.
Adamantane-Dipyrromethane Derivatives, Method Of Preparation And Applications In Anion Sensing
申请人:Basaric Nikola
公开号:US20100069648A1
公开(公告)日:2010-03-18
Aamantane dipyrromethane derivatives are obtained by reacting adamantane carbonyl derivatives with pyrrole or pyrrole derivative, in the presence of acid. Adamantane-dipyrromethanes are used to bind anions of the group consisting of: F—, Cl—, Br—, acetate, HSO4— NO3—, and H2PO4—, and particularly F—.
Novel adamantane derivatives of calix[4]pyrroles 4-8 and calixphyrin 9 have been synthesized. The structure of 8 has been characterized by X-ray powder diffraction and the structure of 9 by single crystal X-ray analysis. Whereas calixphyrin 9 does not bind anions, analogous calyx[4]pyrrole 8 forms a complex with Cl in the DMSO Solution and in the solid state. The solid state complexation has been accomplished on grinding in a mill, which is the first example of complex formation with an anion in the solid state. (C) 2009 Elsevier Ltd. All rights reserved.
WO2008/114067
申请人:——
公开号:——
公开(公告)日:——
ADAMANTANE-DIPYRROMETHANE DERIVATIVES, METHOD OF PREPARATION AND APPLICATIONS IN ANION SENSING