The Experts below are selected from a list of 2100 Experts worldwide ranked by ideXlab platform
Thomas C W Mak - One of the best experts on this subject based on the ideXlab platform.
-
four cobaltic coordination polymers based on 5 iodo Isophthalic Acid halogen related interaction and solvent effect
Crystal Growth & Design, 2012Co-Authors: Shuangquan Zang, Mingming Dong, Yajuan Fan, Hongwei Hou, Thomas C W MakAbstract:A series of four novel cobaltic coordination polymers based on 5-iodo-Isophthalic Acid (5-iipa) and 1,1′-(1,4-butanediyl)bis(imidazole) (bbi), namely, [Co(5-iipa)(bbi)·3(H2O)]n (1), [Co2(5-iipa)2(b...
Raimo K. Tuominen - One of the best experts on this subject based on the ideXlab platform.
-
Scaffold hopping from (5-hydroxymethyl) isophthalates to multisubstituted pyrimidines diminishes binding affinity to the C1 domain of protein kinase C.
PloS one, 2018Co-Authors: Riccardo Provenzani, Virpi Talman, Jari Yli-kauhaluoma, Ilari Tarvainen, Giulia Brandoli, Antti Lempinen, Sanna Artes, Ainoleena Turku, Maria Jäntti, Raimo K. TuominenAbstract:Protein kinase C (PKC) isoforms play a pivotal role in the regulation of numerous cellular functions, making them extensively studied and highly attractive drug targets. Utilizing the crystal structure of the PKCδ C1B domain, we have developed hydrophobic Isophthalic Acid derivatives that modify PKC functions by binding to the C1 domain of the enzyme. In the present study, we aimed to improve the drug-like properties of the Isophthalic Acid derivatives by increasing their solubility and enhancing the binding affinity. Here we describe the design and synthesis of a series of multisubstituted pyrimidines as analogs of C1 domain-targeted isophthalates and characterize their binding affinities to the PKCα isoform. In contrast to our computational predictions, the scaffold hopping from phenyl to pyrimidine core diminished the binding affinity. Although the novel pyrimidines did not establish improved binding affinity for PKCα compared to our previous Isophthalic Acid derivatives, the present results provide useful structure-activity relationship data for further development of ligands targeted to the C1 domain of PKC.
Shuangquan Zang - One of the best experts on this subject based on the ideXlab platform.
-
Four Cobaltic Coordination Polymers Based on 5-Iodo-Isophthalic Acid: Halogen-Related Interaction and Solvent Effect
2016Co-Authors: Shuangquan Zang, Mingming Dong, Yajuan Fan, Hongwei Hou, Thomas C. W. MakAbstract:A series of four novel cobaltic coordination polymers based on 5-iodo-Isophthalic Acid (5-iipa) and 1,1′-(1,4-butanediyl)bis(imidazole) (bbi), namely, [Co(5-iipa)(bbi)·3(H2O)]n (1), [Co2(5-iipa)2(bbi)2·3(C2H6O2)]n (2), [Co(5-iipa)(bbi)·DMF]n (3) (DMF = N,N′-dimethylformamide), and [Co2(5-iipa)2(bbi)2·2DMAc]n (4) (DMAc = N,N′-dimethylacetamide) have been solvothermally synthesized by using various solvents. Their thermal analysis, XRD and UV–vis absorption spectra have been investigated as well. Structural analyses exhibit that they all form 2D covalent structures based on the intersection of Co-5-iipa and Co-bbi chains, and adjacent layers are parallel and united together to yield a 3D supramolecular structure through interlayer I···I, I···π, or C–H···O interactions, respectively. More interestingly, channels are detected in the architectures, which are mainly occupied by the guest solvent molecules. Compound 1 features a rare 3-fold interpenetrating 3D supramolecular architecture, while compound 2 exhibits an interesting 3-fold parallel interpenetrated two-dimensional (2D) → three-dimensional (3D) network motifs based on I···I interactions. The adjacent 2D parallel layers in compound 3 deviate from each other with the shift of 3.89 Å along the b or –b axis. Compound 4 shows a double layer structure in which the bbi-Co waving-like ribbon is running along the c-axis. Results demonstrate that both halogen-related interaction and solvent effect play important roles in the assembly of the supramolecular metal–organic networks
-
four cobaltic coordination polymers based on 5 iodo Isophthalic Acid halogen related interaction and solvent effect
Crystal Growth & Design, 2012Co-Authors: Shuangquan Zang, Mingming Dong, Yajuan Fan, Hongwei Hou, Thomas C W MakAbstract:A series of four novel cobaltic coordination polymers based on 5-iodo-Isophthalic Acid (5-iipa) and 1,1′-(1,4-butanediyl)bis(imidazole) (bbi), namely, [Co(5-iipa)(bbi)·3(H2O)]n (1), [Co2(5-iipa)2(b...
Yaoyu Wang - One of the best experts on this subject based on the ideXlab platform.
-
two alkaline earth metal coordination polymers based on a new oxamate dicarboxylate ligand selective fluorescence sensing of fe3 in aqueous solution
Inorganic Chemistry Communications, 2019Co-Authors: Wenjuan Shi, Lei Hou, Yaoyu WangAbstract:Abstract Two different alkaline earth metal coordination polymers (AE-CPs) {[Ca3L2(H2O)6]·2H2O}n (1) and [Sr(H2L)2]n (2) were constructed from using 5-(ethyl oxamate)-Isophthalic Acid (H2EtL) ligand with alkaline earth metal ions Ca2+ and Sr2+ under solvothermal conditions, respectively. Among them, L and H2L are formed by in-situ hydrolysis of H2EtL, which display multiple kinds of coordinated modes through oxamate and carboxylate groups. 1 and 2 both show three-dimensional coordination frameworks possessing unprecedented (3,4,5)-connected skg1 topology and (3,6)-connected ant topology, respectively. The solid-state fluorescence properties of 1 and 2 were studied, and 1 with bright blue luminescence reveals selective sensing toward Fe3+ ion in water with the low detection limit (LOD) of 1.04 × 10−3 M.
-
Three Cd(II) coordination polymers based on a pyridyldicarboxylate: effect of coordinated water
2018Co-Authors: Hui-fang Zhou, Bo Liu, Zi-yu Wang, Gui-lin Wen, Yaoyu WangAbstract:By systematic change of the solvothermal synthesis, three new coordination polymers, [Cd(L)∙(H2O)]∙2H2O (1), [Cd(L)∙(H2O)]∙H2O (2), and [Cd(L)] (3), have been synthesized based on a tritopic ligand 4-(pyridin-3-yl)Isophthalic Acid (H2L). Compounds 1 and 2 show very similar two-dimensional (2D) bilayers further linked by interlayer hydrogen bonds into three-dimensional (3D) supramolecular structures, while 3 displays a 3D structure constructed form one-dimensional (1D) Cd-carboxyl chains. Notably, 1 and 2 have a pair of unusual isomers with the opposite orientation of coordinated H2O on the metal centers, leading to different hydrogen bonding interactions. Thermal stabilities and solid-state photoluminescences for 1–3 were also investigated.
-
five new cd ii complexes induced by reaction conditions and coordination modes of 5 1h tetrazol 5 yl Isophthalic Acid ligand structures and luminescence
Crystal Growth & Design, 2016Co-Authors: Haihua Wang, Lei Hou, Hongyun Yang, Chenhao Shu, Ziyi Chen, Yaoyu WangAbstract:Five new Cd(II) complexes, {[Cd1.5(tzia)(H2O)2]·H2O}n (1), {[Cd1.5(tzia)(H2O)4]·1.5H2O}n (2), [Cd(H2tzia)2(H2O)4]·H2O (3), [Cd5(μ3-OH)(tzia)3(H2O)7]·2H2O}n (4), and {[Cd2(μ3-OH)(tzia)(H2O)2]·H2O}n (5) (H3tzia = 5-(1H-tetrazol-5-yl)Isophthalic Acid), were assembled employing a tetrazolyl-carboxyl ligand H3tzia with Cd(II) ions, revealing versatile structures from zero-dimensional (0D) mononuclear molecule, 2D layer to 3D framework, in which five new types of coordination modes of H3tzia were observed. Complex 1 shows a 3D (3,6)-connected ant net based on trinuclear [Cd3(COO)2(N4C)2] cluster; 2 forms an unusual 3D (3,4)-connected 3,4T1 net with 1D tubes based on the 26-membered metallocycles; 3 is a mononuclear molecule; 4 displays an unprecedented (3,4,10)-connected 2D layer based on pentanuclear [Cd5(μ3-OH)(COO)2(N4C)3] cluster; 5 is a 3D porous framework containing 1D Cd-hydroxy-tetrazolyl ribbons. Complexes 1–5 exhibit strong luminescence with different energies resulted from the various coordination mo...
Ganbing Yao - One of the best experts on this subject based on the ideXlab platform.
-
determination and prediction of solid liquid phase equilibrium for quaternary system of terephthalic Acid Isophthalic Acid phthalic Acid n methyl 2 pyrrolidone at 303 15k and 313 15k
Fluid Phase Equilibria, 2015Co-Authors: Shuo Han, Jian Wang, Ganbing Yao, Yun Hao Zhong, Hongkun ZhaoAbstract:Abstract Solid–liquid phase equilibrium and solubility data for quaternary system of terephthalic Acid + Isophthalic Acid + phthalic Acid + N-methyl-2-pyrrolidone at 303.15 K and 313.15 K were determined by Schreinemakers’ method of wet residue under atmosphere pressure. Based on the measured solubility, the quaternary phase diagrams were constructed at the two studied temperatures according to the Janeck method. At each temperature, the quaternary phase diagram includes three crystallization regions of pure solid, three co-saturated curves and one eutectic point. The three pure solids are phthalic Acid, adduct of Isophthalic Acid with N-methyl-2-pyrrolidone (the mole ratio of Isophthalic Acid to N-methyl-2-pyrrolidone is 1:2), adduct of terephthalic Acid with N-methyl-2-pyrrolidone (the mole ratio of terephthalic Acid to N-methyl-2-pyrrolidone is 1:2), which are confirmed by the method of Schreinemakers’ wet residue. The crystallization region of adduct of terephthalic Acid with N-methyl-2-pyrrolidone is larger than those of phthalic Acid and adduct of Isophthalic Acid with N-methyl-2-pyrrolidone. Furthermore, the quaternary solid–liquid phase equilibrium were predicted by NRTL model. The calculated quaternary phase diagrams agreed well with experimental data.
-
phase equilibrium and phase diagram for the system of benzene dicarboxylic Acid n methyl 2 pyrrolidone
Journal of Chemical & Engineering Data, 2014Co-Authors: Ganbing Yao, Yaping Sun, Ling Wang, Long Meng, Xu ZhangAbstract:The mutual solubility for ternary systems of terephthalic Acid + Isophthalic Acid + N-methyl-2-pyrrolidone, phthalic Acid + Isophthalic Acid + N-methyl-2-pyrrolidone, and phthalic Acid + terephthalic Acid + N-methyl-2-pyrrolidone were measured at 303.15 K and 313.15 K under normal pressure. Six phase diagrams were plotted on the basis of the measured solubility data. Two pure solids were formed for each system, and they were recognized by the method of Schreinemakers’ wet residue. Two crystalline adducts were formed, which were the adduct of Isophthalic Acid with N-methyl-2-pyrrolidone (named as N, Isophthalic Acid/N-methyl-2-pyrrolidone = 1:2 in mole ratio) and adduct of terephthalic Acid with N-methyl-2-pyrrolidone (named as M, terephthalic Acid/N-methyl-2-pyrrolidone = 1:2 in mole ratio). Each phase diagram exhibited only one eutectic point. The crystallization fields of phthalic Acid, adduct N and adduct M were increased as the temperature increased. At the same temperature, the crystallization field ...
