Evidence of anion-induced dimerization of a squaramide-based host in protic solvents
作者:M. Neus Piña、Carmen Rotger、Bartomeu Soberats、Pablo Ballester、Pere M. Deyà、Antoni Costa
DOI:10.1039/b614172b
日期:——
The combination of squaramide units with tetraalkylammonium groups leads two hosts that bind distinctively dianions in water–ethanol mixtures. The formation of complexes of 2 : 1 stoichiometry with host 2 was supported by ITC, fluorescence, and 1H NMR data.
作者:Carolina Estarellas、M. Carmen Rotger、Magdalena Capó、David Quiñonero、Antonio Frontera、Antoni Costa、Pere M. Deyà
DOI:10.1021/ol900470r
日期:2009.5.7
In this study, the importance of anion−π interactions in four-memberedrings has been evidenced. Two kinds of rings have been found to be suitable for participation in anion−π interactions: first, in different salts of cyclobuten-1,2-dione derivatives and, second, in η4-cyclobutadiene complexes with transition metals.
Synthesis of Unsymmetrical Mono- and Bissquaramides with (3-Aminopropyl)triethoxysilane (APTES) or Dopamine Moieties
作者:Jeroni Morey、Kenia López、M. Piña
DOI:10.1055/s-0032-1317546
日期:——
A simple and efficient synthesis of unsymmetrical mono- and bissquaramides derivatives and their corresponding methyltrialkyl ammoniumsalts was achieved in moderate yields from diethyl squarate via sequencial reactions.
Grafted squaramide monoamine nanoparticles as simple systems for sulfate recognition in pure water
作者:Estefanía Delgado-Pinar、Carmen Rotger、Antonio Costa、M. Neus Piña、Hermas R. Jiménez、Javier Alarcón、Enrique García-España
DOI:10.1039/c2cc17798f
日期:——
New simple systems formed by a chain containing a squaramide function and a quaternised amine group attached to boehmite or silica-coated boehmite nanoparticles are able to discriminate anions in pure water.
Synthetic Tripodal Squaramido-Based Receptors for the Complexation of Antineoplastic Folates in Water
作者:David Quiñonero、Kenia A. López、Pere M. Deyà、M. Nieves Piña、Jeroni Morey
DOI:10.1002/ejoc.201100855
日期:2011.11
Three suitably oriented squaramido ammonium groups form the basis of the first abiotic receptor that employs the noncovalent ammonium–carboxylate electrostatic interaction and a hydrogen bond to achieve high-affinity molecular recognition in water. These interacctions have been studied experimentally by isothermal calorimetry (ITC), NMR spectroscopy, and MS. Also, we have proposed a model for coordination
三个适当定向的方氨基铵基团构成了第一个非生物受体的基础,该受体利用非共价铵-羧酸盐静电相互作用和氢键在水中实现高亲和力分子识别。这些相互作用已通过等温量热法 (ITC)、NMR 光谱和 MS 进行了实验研究。此外,我们从 DFT 计算和 NMR 光谱研究中提出了一个协调模型。最后,受体与 5-羧基荧光素的荧光集合可用于使用竞争测定法对商业样品中的叶酸和甲氨蝶呤进行定量荧光测定。