Naphthalene linked pyridyl urea as a supramolecular gelator: a new insight into naked eye detection of I−in the gel state with semiconducting behaviour
A Pyridinium-Urea-Coupled Polyether Receptor for the Selective Sensing of Lysine and Cell Imaging
作者:Kumaresh Ghosh、Debojyoti Tarafdar、Ioannis D. Petsalakis、Giannoula Theodorakopoulos
DOI:10.1002/ejoc.201601203
日期:2017.1.10
The pyridinium–urea‐coupled polyetherreceptor 1 with a naphthalene fluorophore is a fluororeceptor for the selectivesensing of lysine over a series of other amino acids. The receptor exhibits significantly increased fluorescence intensity upon interaction with lysine in CH3CN/H2O. Furthermore, receptor 1 responds to lysine in the cellular environment.
吡啶-脲偶联的聚醚受体1和萘荧光团是一种氟受体,用于选择性感测赖氨酸而不是其他一系列氨基酸。受体与CH 3 CN / H 2 O中的赖氨酸相互作用后,荧光强度显着增加。此外,受体1在细胞环境中对赖氨酸有反应。
Naphthalene linked pyridyl urea as a supramolecular gelator: a new insight into naked eye detection of I<sup>−</sup>in the gel state with semiconducting behaviour
The gelation and anion responsive behavior of some 3-aminopyridinium-based molecules1–5have been examined. Compound2shows naked eye detection of I−in the gel state.
Three supramolecular complexes, [ML2Cl2(MeOH)2] (M = Cu (1), Co (2) and Ni (3); L = N-(1-naphthyl)-N′-(3-pyridyl)urea) have been synthesized and characterized. X-ray single-crystal diffraction analyses revealed a 2D network for the isomorphous complexes 1, 2 and 3 formed by intermolecular N–H⋯Cl hydrogen bonding and π–π stacking interactions. The fluorescentproperties of the complexes have been investigated
摘要 三种超分子配合物 [ML2Cl2(MeOH)2](M = Cu (1)、Co (2) 和 Ni (3);L = N-(1-萘基)-N'-(3-吡啶基)脲)已被合成和表征。X 射线单晶衍射分析揭示了由分子间 N-H⋯Cl 氢键和 π-π 堆积相互作用形成的同晶配合物 1、2 和 3 的二维网络。已经研究了配合物的荧光特性。与 L 相比,复合物 2 和 3 在固态中显示出红移的荧光发射,而复合物 1 则显示出荧光猝灭。
Hydrogen-bonded 1D nanotubes and 2D layers of group 12 metal complexes with a pyridylurea ligand
isomorphous 2D sheet structures held by N–H⋯O hydrogen bonds and π–π stacking interactions. The 2D sheets are further linked by C–H⋯Cl/Br weak interactions into a hydrogen-bonded 3D framework. Notably, compound 6 contains an uncommon trigonal-planar HgII center and forms a 1D chain structure via the typical urea⋯urea hydrogen bonding and π–π stacking interactions of L, which further aggregates to a 2D parallelogram
一系列第12组金属配合物[ZnCl 2 L 2 ]·H 2 O(1),[ZnBr 2 L 2 ]·0.75EtOH(2a),[ZnBr 2 L 2 ]·0.8H 2 O(2b), [ZnI 2 L 2 ](3),[HgCl 2 L 2 ](4),[HgBr 2 L 2 ](5)和[HgI 2 L](6)是由萘基取代的吡啶基脲配体合成的N-(1-萘基)-N '-(3-吡啶基)脲(L)和锌(II)或汞(II)卤化物。在锌(II)二氯配合物1中,氯离子不仅参与金属配位,而且还参与与尿素NH基团形成的N–H⋯Cl氢键,从而形成整体的层状结构。相反,2和3中的配位溴化物和碘化物阴离子不参与氢键键合。取而代之的是,脲基团进行自我缔合以形成由半大环[ZnX 2 L 2 ]合成子堆叠的,具有各种孔径的纳米管结构。最有趣的是,尽管溶剂分子不同[乙醇(2a)及高氧2(2b)]可以封装在纳米管状二溴锌配合物中,在EtOH
Sulfate binding in zinc(II) complexes of a monopyridylurea ligand N-(1-naphthyl)-N′-(3-pyridyl)urea
Abstract Two zinc(II) complexes of a urea-functionalized pyridyl ligand, [Zn(SO4)L3]·CH3OH ( 1 ) and [Zn(μ2-SO4)L2]·0.5CH3OH}n ( 2 ) (L = N-(1-naphthyl)-N′-(3-pyridyl)urea), have been synthesized by the reaction of L with ZnSO4·7H2O under different conditions. Complex 1 is a hydrogen-bonded 2D grid structure in which the sulfate anion not only coordinates to the ZnII ion as a monodentate ligand but