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dicarboxylic acid

Zhao-Feng Wu, Liao-Kuo Gong, Xiao-Ying Huang
Here we report a fluorescent magnesium coordination polymer (Mg-CP), namely, [CH3-dpb]2[Mg3(1,4-NDC)4(μ-H2O)2(CH3OH)(H2O)]·1.5H2O (1, 1,4-H2NDC = 1,4-naphthalene dicarboxylic acid, dpb = 1,4-bis(pyrid-4-yl)benzene). Compound 1 possesses a three-dimensional (3D) host-guest structure constructed by the 1,4-NDC linkers bridging the linear trinuclear secondary building units of [Mg3(COO)8(μ-H2O)2]. The dpb molecules were in situ reacted with CH3OH resulting in photochromic cations of [CH3-dpb](+) that acted as guests located in the channels parallel to the b-axis...
June 21, 2017: Inorganic Chemistry
Thomas C Nardelli, Océane Albert, Claudia Lalancette, Martine Culty, Barbara F Hales, Bernard Robaire
Di(2-ethylhexyl) phthalate (DEHP) and other phthalates are ubiquitous environmental contaminants with endocrine disrupting properties. Two novel plasticizers, 1,4 butanediol dibenzoate (BDB) and dioctyl succinate (DOS), have been proposed as potential replacements. Both have desirable properties as plasticizers and minimal in vitro biological effects. Herein, we present an in utero and lactational exposure study comparing DEHP with BDB, DOS, and 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH), a commercial alternative...
June 20, 2017: Scientific Reports
Shuai Tan, Feng He, Tingting Kong, Jingde Wu, Zhaopeng Liu
As a continuous research for the discovery of coumarin-based targeted anticancer agents, we designed and synthesized a series of novel histone deacetylases (HDAC) inhibitors using the 8-ethoxy-3-nitro-2H-chromene as the surface binding or cap group, linear dicarboxylic acid or ω-amino acid moiety with different length as the linking motif, ortho-aminoanilides, amides or α-aminoamides as the zinc binding group and the internal cavity motifs. Most of these 3-nitro-2H-chromene derivatives exhibited good growth inhibitory activity against K562, A549, MCF-7, PC3 and Hela cells and were more potent than the reference drug SAHA and MS-275...
June 1, 2017: Bioorganic & Medicinal Chemistry
Sayed Ali Akbar Razavi, Mohammad Yaser Masoomi, Ali Morsali
The ligands (3,6-di(pyridin-4-yl)-1,4-dihydro-1,2,4,5-tetrazine), H2DPT, as a pillar spacer and (4,4'-oxybis(benzoic acid)), H2OBA, as a dicarboxylate linker were used to develop a dihydro-tetrazine functionalized pillared-MOF, [Zn(OBA)(H2DPT)0.5].DMF (TMU-34) as functionally convertible stimuli responsive MOF-based Sensor. Sonochemically synthesized powder of TMU-34 was employed in sensing of volatile organic compounds (VOCs). The results show that TMU-34 can act as a solid state naked-eye visual chemosensor for detection of chloroform in liquid and gas phases...
June 17, 2017: Chemistry: a European Journal
Min Jiang, Jiangfeng Ma, Mingke Wu, Rongming Liu, Liya Liang, Fengxue Xin, Wenming Zhang, Honghua Jia, Weiliang Dong
Succinic acid is a four-carbon dicarboxylic acid, which has attracted much interest due to its abroad usage as a precursor of many industrially important chemicals in the food, chemicals, and pharmaceutical industries. Facing the shortage of crude oil supply and demand of sustainable development, biological production of succinic acid from renewable resources has become a topic of worldwide interest. In recent decades, robust producing strain selection, metabolic engineering of model strains, and process optimization for succinic acid production have been developed...
June 3, 2017: Bioresource Technology
Robert Stasiuk, Agnieszka Włodarczyk, Przemysław Karcz, Marcin Janas, Aleksandra Skłodowska, Renata Matlakowska
A large part of the organic carbon present in the lithosphere is trapped in fossil organic matter deposited in sedimentary rocks. Only specialized microorganisms are able to degrade it contributing to the return of the carbon to the global cycle. The role of bacteria in this process is not yet completely understood. In the present laboratory studies, subterrestrial organic-rich ∼256-million-year-old Kupferschiefer black shale was exposed to the activity of an indigenous consortium of lithobiontic bacteria for 365 days under aerobic conditions...
June 15, 2017: Environmental Microbiology Reports
Lei Sun, Christopher H Hendon, Sarah S Park, Yuri Tulchinsky, Ruomeng Wan, Fang Wang, Aron Walsh, Mircea Dincă
Identifying the metal ions that optimize charge transport and charge density in metal-organic frameworks is critical for systematic improvements in the electrical conductivity in these materials. In this work, we measure the electrical conductivity and activation energy for twenty different MOFs pertaining to four distinct structural families: M2(DOBDC)(DMF)2 (M = Mg(2+), Mn(2+), Fe(2+), Co(2+), Ni(2+), Cu(2+), Zn(2+)); H4DOBDC = 2,5-dihydroxybenzene-1,4-dicarboxylic acid; DMF = N,N-dimethylformamide), M2(DSBDC)(DMF)2 (M = Mn(2+), Fe(2+); H4DSBDC = 2,5-disulfhydrylbenzene-1,4-dicarboxylic acid), M2Cl2(BTDD)(DMF)2 (M = Mn(2+), Fe(2+), Co(2+), Ni(2+); H2BTDD = bis(1H-1,2,3-triazolo[4,5-b],[4',5'-i]dibenzo[1,4]dioxin), and M(1,2,3-triazolate)2 (M = Mg(2+), Mn(2+), Fe(2+), Co(2+), Cu(2+), Zn(2+), Cd(2+))...
June 1, 2017: Chemical Science
Jeong Chan Joo, Anna N Khusnutdinova, Robert Flick, Taeho Kim, Uwe T Bornscheuer, Alexander F Yakunin, Radhakrishnan Mahadevan
Adipic acid, a precursor for Nylon-6,6 polymer, is one of the most important commodity chemicals, which is currently produced from petroleum. The biosynthesis of adipic acid from glucose still remains challenging due to the absence of biocatalysts required for the hydrogenation of unsaturated six-carbon dicarboxylic acids to adipic acid. Here, we demonstrate the first enzymatic hydrogenation of 2-hexenedioic acid and muconic acid to adipic acid using enoate reductases (ERs). ERs can hydrogenate 2-hexenedioic acid and muconic acid producing adipic acid with a high conversion rate and yield in vivo and in vitro...
February 1, 2017: Chemical Science
Brendan M O'Leary, Chun Pong Lee, Owen K Atkin, Riyan Cheng, Tim B Brown, A Harvey Millar
Plant respiration can theoretically be fuelled by and dependent upon an array of central metabolism components; however, which ones are responsible for the quantitative variation found in respiratory rates is unknown. Here, large scale screens revealed twofold variation in night-time leaf respiration rate (RN) among mature leaves from an Arabidopsis natural accession collection grown under common favourable conditions. RN variation was mostly maintained in the absence of genetic variation, which emphasized the low heritability of RN and its plasticity towards relatively small environmental differences within the sampling regime...
June 14, 2017: Plant Physiology
J Haddad, G F S Whitehead, A P Katsoulidis, M J Rosseinsky
Two new amide functionalised metal-organic frameworks, In(OH)CSA and In(OH)PDG, were synthesized using two flexible linkers, N-(4-carboxyphenyl)succinamic acid (CSA) and N,N'-(1,4-phenylenedicarbonyl)diglycine (PDG), respectively. Both structures consist of corner-sharing {InO4(OH)2} octahedra in the form of trans indium hydroxide chains, which are interconnected by the dicarboxylate linkers to form stacked 2-dimensional layers. The different symmetries and configurations of the flexible and rigid features on the linkers results in different supramolecular interactions dominating between linkers, resulting in different shaped pores and functional group orientation...
June 14, 2017: Faraday Discussions
Ting Zhang, Fang Hong, Guling Qian, Fan Tong, Xuelian Zhou, Xiaolei Huang, Rulai Yang, Xinwen Huang
OBJECTIVE: To delineate the clinical, biochemical and genetic mutational characteristics of a child with mitochondrial complex III deficiency. METHODS: Clinical information and results of auxiliary examination of the patient were analyzed. Next-generation sequencing of the mitochondrial genome and related nuclear genes was carried out. Suspected mutation was confirmed in both parents with Sanger sequencing. Heterozygous deletion was mapped with chromosomal microarray analysis and confirmed with real-time PCR...
June 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
Heeseok Lee, Yohanes Eko Chandra Sugiharto, Seunghoon Lee, Gyuyeon Park, Changpyo Han, Hyeran Jang, Wooyoung Jeon, Heejoon Park, Jungoh Ahn, Kyungbo Kang, Hongwoen Lee
α, ω-Dicarboxylic acids (DCAs) are multipurpose chemicals widely used in polymers, perfumes, plasticizers, lubricants, and adhesives. The biotransformation of DCAs from alkanes and fatty acids by microorganisms has attracted recent interest, since synthesis via chemical oxidation causes problems in terms of the environment and safety. We isolated an ω-oxidizing yeast from a wastewater disposal facility of a petrochemical factory by chemostat enrichment culture. The haploid strain identified as Candida sorbophila DS02 grew on glucose and dodecane, exhibiting greater cell shrinkage on the latter...
June 6, 2017: Applied Microbiology and Biotechnology
Yonghong Fu, Zhihong Si, Pumin Li, Minghui Li, He Zhao, Lei Jiang, Yuexiao Xing, Wei Hong, Lingyu Ruan, Jun-Song Wang
Datura metel L. (D. metel) is one well-known folk medical herb with wide application and also the most abused plants all over the world, mainly for spiritual or religious purpose, over-dosing of which often produces poisonous effects. In this study, mice were orally administered with the extract of D. metel once a day at doses for 10 mg/kg and 40 mg/kg for consecutive 4 days, (1)H NMR based metabolomics approach aided with histopathological inspection and biochemical assays were used for the first time to study the psychoactive and toxic effects of D...
June 5, 2017: Metabolic Brain Disease
Jing-Xin Ma, Jiarui Guo, Hailong Wang, Bin Li, Tianlin Yang, Banglin Chen
A novel pillar-layer porous lanthanide metal-organic framework [Tb3(ODA)3(BPDC)3Na2]n·Gx (UTSA-222, G = guest molecules) was constructed from an organic ligand [1,1'-biphenyl]-4,4'-dicarboxylate (BPDC(2-)) and a lanthanide metalloligand [Tb(ODA)](+) (H2ODA = oxydiacetic acid). The UTSA-222 contains two-dimensional intersecting channels with the Brunauer-Emmett-Teller surface area and pore volume of 703 m(2) g(-1) and 0.344 cm(3) g(-1), respectively, for the activated sample. It shows moderately high adsorption selectivity for C2H2/CO2 and C2H2/CH4 separations at 1 atm and room temperature...
June 5, 2017: Inorganic Chemistry
Wei Wei Fu, Juan Li, Shu Ting Liu, Dan Zhao, Xue Zhou, Yang Tong
The bifunctional pyridine-2,3-dicarboxylic acid (H2pdc) ligand has one N atom and four O atoms, which could bind more than one Ag(I) centre with diverse binding modes. A novel infinite one-dimensional Ag(I) coordination polymer, namely catena-poly[[silver(I)-(μ2-pyridine-2,3-dicarboxylato-κ(2)N:O(3))-silver(I)-tris(μ2-5-methyl-1,3,4-thiodiazol-2-amine-κ(2)N:N')] monohydrate ethanol monosolvate], {[Ag2(C7H3NO4)(C3H5N3S)3]·H2O·C2H5OH}n, has been synthesized using H2pdc and 5-methyl-1,3,4-thiadiazol-2-amine (tda), and characterized by single-crystal X-ray diffraction...
June 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
Pei Ying Guo, De Yun Ma, Hai Fu Guo
The 2-methylbiphenyl-4,4'-dicarboxylate (mbpdc(2-)) ligand has versatile coordination modes and can be used to construct multinuclear structures. Despite this, reports of the synthesis of coordination complexes involving this ligand are scarce. The title compound, poly[[triaquadi-μ3-hydroxido-hexakis(μ4-2-methylbiphenyl-4,4'-dicarboxylato)calcium(II)hexazinc(II)] monohydrate], {[CaZn6(C15H10O4)6(OH)2(H2O)3]·H2O}n, has been prepared by the hydrothermal assembly of Zn(NO3)2·6H2O, CaCl2 and 2-methylbiphenyl-4,4'-dicarboxylic acid...
June 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
Hong Shen, Weiqi Chen, Dieter M Drexler, Sandhya Mandlekar, Vinay K Holenarsipur, Eric E Shields, Robert Langish, Kurex Sidik, Jinping Gan, W Griffith Humphreys, Punit Marathe, Yurong Lai
Multiple endogenous compounds have been proposed as candidate biomarkers to monitor organic anion transporting polypeptide (OATP) function in preclinical species or humans. Recently we have demonstrated that coproporphyrins (CPs) I and III are appropriate clinical markers to evaluate OATP inhibition and recapitulate clinical drug-drug interactions (DDIs). In the present studies, we investigated bile acids (BAs), dehydroepiandrosterone sulfate (DHEAS), hexadecanedioate (HDA), and tetradecanedioate (TDA) in plasma as endogenous probes for OATP inhibition and compared these candidate probes to CPs...
June 2, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
Taishi Yokoi, Shingo Machida, Yoshiyuki Sugahara, Masami Hashimoto, Satoshi Kitaoka
Enantioselectivity by octacalcium phosphate (OCP) is revealed through the incorporation of (S)-(-)-methylsuccinic acid (MeSuc) into its crystal lattice, with hardly any (R)-(+)-MeSuc incorporated. This phenomenon clearly indicates that OCP recognizes the steric structures of guest molecules, extending chiral recognition in inorganic materials to three-dimensional crystal growth.
June 2, 2017: Chemical Communications: Chem Comm
Zohreh Derikvand, Xian B Powers, Marilyn M Olmstead
The structure of Ni(Hpydc)2·3H2O (H2pydc = pyridine-2,6-dicarboxylic acid, also known as dipicolinic acid) has been reinvestigated at variable temperatures. At room temperature, it matches the known structure in the space group P21/c, but at 180 K it undergoes a phase transformation to a twinned structure in Cc. By 120 K, the structure is ordered and twinned with Z' = 4, and shows interesting short hydrogen-bonding interactions that include the formation of hydroxonium species.
June 1, 2017: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
Agné Kulyté, Anna Ehrlund, Peter Arner, Ingrid Dahlman
Although the mechanisms linking obesity to insulin resistance (IR) and type 2 diabetes (T2D) are not entirely understood, it is likely that alterations of adipose tissue function are involved. The aim of this study was to identify new genes controlling insulin sensitivity in adipocytes from obese women with either insulin resistant (OIR) or sensitive (OIS) adipocytes. Insulin sensitivity was first determined by measuring lipogenesis in isolated adipocytes from abdominal subcutaneous white adipose tissue (WAT) in a large observational study...
2017: PloS One
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