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不同炉中钎焊气氛对不锈钢耐腐蚀性能的影响

热加工工艺 2024年第9期53卷 50-54页

作者：黄昌文陈建平林泓延广东万和新电气股份有限公司热厨制造中心广东佛山528305 佛山职业技术学院智能制造学院广东佛山528317 广东技术师范大学机电学院广东广州510630

考虑企业生产的安全性和经济性,家用燃气快速热水器用铜制热交换器炉中钎焊工艺的保护气氛由氨分解气气氛改为天然气气氛,但发现热交换器水道管路中304不锈钢扰流弹簧易产生氧化腐蚀。本文以430和304不锈钢扰流弹簧为研究对象,将弹簧在... 详细信息

考虑企业生产的安全性和经济性,家用燃气快速热水器用铜制热交换器炉中钎焊工艺的保护气氛由氨分解气气氛改为天然气气氛,但发现热交换器水道管路中304不锈钢扰流弹簧易产生氧化腐蚀。本文以430和304不锈钢扰流弹簧为研究对象,将弹簧在氨分解气与天然气气氛的网带式高温钎焊炉中进行800~830℃的钎焊,然后进行24、48 h的大气氧化试验,以及72 h的中性盐雾试验,研究了高温条件下氨分解气与天然气气氛对不锈钢材料耐腐蚀性能的影响。结果表明:经过氨分解气和天然气气氛钎焊的304不锈钢扰流弹簧在24、48 h大气氧化试验后均产生明显腐蚀,且天然气保护气氛加剧了其腐蚀程度。炉中钎焊温度800~830℃达到304不锈钢材料的敏化温度区间,导致晶间腐蚀,对其抗氧化性能具有明显的影响,而对430不锈钢材料并未有明显影响。430不锈钢在同等条件下的耐腐蚀性能优于304不锈钢。建议热交换器水道管路中的扰流弹簧选择430不锈钢。

关键词：氨分解气天然气不锈钢耐腐蚀性

Syntheses, Structure and Properties of a 3d-4d/2-ptz Heterometallic Organic Chain-modified POM-based Framework

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Chemical Research in Chinese Universities 2017年第1期33卷 7-11页

作者： WANG Xiang lin lin lin hongyan LIU Guocheng Faculty of Chemistry and Chemical Engineering Bohai University Jinzhou 121000 P. R. China

A novel polyoxometalate-based hybrid modified by 3d-4d/2-ptz heterometallic organic chains[n-ptz= 5-（n-pyridyl）-tetrazolate], Ag2[Cu（2-ptz）2][β-MosO26]0.5-H20（1）[2-ptz=5-（2-pyridyl）-tetrazolate], was synthesized under hydrothermal conditions. The 3D framework structure of compound 1 was constructed from 1D novel 3d-4d heterometallic organic chains [CuAg2（2-ptz）2]2＋ as cationic complexes and [β-Mo8026]4- polyoxoanions via Cu--O and Ag--O bonds, in which each [fl-MosO26]4- polyoxoanion was surrounded by six such chains. The electrochemical and photocatalytic properties of compound I were investigated.

关键词： Polyoxometalate Heterometallic organic chain Crystal structure

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对羟苯基丙酮酸双加氧酶的研究进展

农药学学报 2024年第2期26卷 266-277页

作者：林若煊邹用科柳国蓉董进于欣禾林红艳杨光富华中师范大学绿色农药全国重点实验室武汉430079

农药作用靶标或作用机制的创新是农药科学研究需要解决的关键科学问题之一。对羟苯基丙酮酸双加氧酶(4-hydroxyphenylpyruvate dioxygenase,HPPD)是生物体酪氨酸代谢途径中的关键酶,在不同的生物体内参与的代谢路径不同。前期的研究表明... 详细信息

农药作用靶标或作用机制的创新是农药科学研究需要解决的关键科学问题之一。对羟苯基丙酮酸双加氧酶(4-hydroxyphenylpyruvate dioxygenase,HPPD)是生物体酪氨酸代谢途径中的关键酶,在不同的生物体内参与的代谢路径不同。前期的研究表明,HPPD抑制剂在医药和除草方面发挥了较大的作用,而近期的研究发现其在抑菌和杀蚊等方面也表现出了潜在的应用价值。本文概述了HPPD在不同生物体中的生理功能,介绍了HPPD在人、植物、吸血节肢动物、真菌体内参与的代谢过程,总结了不同种属来源HPPD的三维结构,概述了HPPD作为靶标在医药以及农药(除草、杀虫、杀菌等)方面的研究现状并进行了展望。

关键词：对羟苯基丙酮酸双加氧酶(HPPD) 农药靶标绿色农药研究进展

Carboxylate-induced Various Structures of Ni(II) Complexes with Fluorescence Sensing and Bifunctional Electrochemical Properties

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Chemical Research in Chinese Universities 2019年第4期35卷 549-555页

作者： LU Xue LIU Guocheng WANG Xiang lin hongyan WANG Xiuli Liaoning Province Silicon Materials Engineering Technology Research Centre Department of Chemistry Bohai University Jinzhou 121013P. R. China

We synthesized three new Ni(II) coordination polymers [Ni(LXHLPXH2O)2]- H2O(CP1),[Ni(LXNIP)]-2H2O(CP2) and [Ni(LXNDCXH20)2](CP3)[L=N,N′-bis(pyridme-3-yl)thiophene-2,5-dicarboxamide, H2HIP=5-hydroxyisophthalic acid, H2NIP=5-nitroisophthalic acid, H2NDC=2,6-naphthalenedicarboxylie acid] by hydrothermal method, which were characterized by means of infrared spectra(IR), TG analyses, PXRD and single-crystal X-ray diffraction. The CPI is a ID tubular structure based on [Ni-HIP]2 loops and pairs of L ligands. CP2 is a 2D 3,5-connected architecture, which consists of Ni-L linear chains and (Ni-NIP)2 double chains. CP3 is a 2D network, which features 4-connected topology. Solid-state luminescent behaviours of CP-P3 were investigated. The CPI can detect Fe^3+ ions through luminescence quenching. The electrochemical properties of CPI buk-modified carbon paste electrode(CP1-CPE) has also been investigated, which has bifunctional electrocatalytic activity for oxidation of ascorbic acid and reduction of NO2^-.

关键词： Carboxylate-induced Coordination polymer Fluorescent recognition Bifunctional electrocatalysis

Three Ni（II） Coordination Polymers with Various Architectures Based on Asymmetric Bis-pyridyl-amide and Polycarboxylates： Syntheses, Structures and Properties

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Chemical Research in Chinese Universities 2016年第5期32卷 719-724页

作者： WU Xiaomei LIU Guocheng WANG Xiuli SHAO Jiyan lin hongyan WANG Xiang Department of Chemistry Liaoning Province Silicon Materials Engineering Technology Research Centre Bohai University Jinzhou 121000 P. R. China

Three different dimensionalNi（II） coordination polymers, [Ni（3-pna）（HIP）（H2O）3]-H20（1）, [Ni（3-pna）- （1,3,5-HBTC）]（2） and [Ni2（H2O）（3-pna）2（1,4-CHDC）2]4（3）（3-pna=3-pyridylnicotinamide, H2HIP=5-hydroxyisoph- thalic acid, 1,3,5-H3BTC=l,3,5-benzenetricarboxylic acid, 1,4-H2CHDC=l,4-cyclohexanedicarboxylic acid）, were synthesized under hydrothermal conditions and characterized by means of infrared spectra（IR）, thermal gravimetric （TG） analyses, powder X-ray diffraction（PXRD） and single-crystal X-ray diffraction. Complex 1 has a structure of 1D single-stranded chain, which is further stretched by hydrogen-bond interactions to form a 2D supramolecular sheet. Complex 2 shows a 2D network, which is stretched to 3D supramolecular frameworks through hydrogen-bond interactions. Complex 3 reveals a 3D skeleton with a （3,3,6,6）-connected {3·72} {32·4 } {33·42·5·73·85·9 } {33·45·52·72·82·9} topology. The effects of different polycarboxylates on the ultimate architectures of the complexes 1--3 were dis- cussed. Furthermore, the fluorescent and photocatalytic properties of the title complexes were also investigated.

关键词： Crystal structure Dipyridylamide Polycarboxylate Photoluminescence property Photocatalytic property

Two New Inorganic-organic Hybrid Compounds Constructed from Different Polymolybdates and Transition Metal-amine Subunits

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Chemical Research in Chinese Universities 2015年第3期31卷 337-341页

作者： WANG Xiuli LIU Danna HAN Na lin hongyan LUAN Jian TIAN Aixiang Liaoning Province Silicon Materials Engineering Technology Research Centre Department of ChemistryBohai University Jinzhou 121000 P.R.China

Two new polyoxometalate（POM）-based hybrid compounds, [Cu（en）][H4Mo4O16]0.5（1）（en=ethylenediamine） and [Ag（3-CsH6N2）2][H2PMo12O40]（2）（3-C5H6N2=3-aminopyridine）, containing different transition metal- amine subunits were hydrothermally synthesized and characterized by elemental analyses, infrared spectroscopy and single-crystal X-ray diffraction. For compound 1, each [H4Mo4O16]4-（M04O16） cluster was linked to four neighboring Mo4O16 clusters through four [Cu（en）]2＋ subunits to yield a （2,4）-connected 2D layer, which was further extended to a 3D supramolecular network via hydrogen bonding interactions. For compound 2, the adjacent [H2PMo12O40]- clusters were bridged by [Ag（3-C5H6N2）2]＋ subunits to generate a 1D chain. The electrochemical behaviors and the photoca- talytic activities of compounds 1 and 2 were studied in detail.

关键词： Polyoxometalate Metal-amine unit Crystal structure Electrochemical property Photocatalysis

Polyoxometalate-based metal-organic complexes constructed from a new bis-pyrimidine-amide ligand with high capacitance performance and selectivity for the detection of Cr(Ⅵ)

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Chinese Chemical Letters 2022年第9期33卷 4389-4394页

作者： Qianqian Liu Junjun Lu hongyan lin Xiuli Wang Zhihan Chang Yongzhen Chen Yuchen Zhang College of Chemistry and Materials Engineering Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar CellBohai UniversityJinzhou 121013China

In this paper,three new polyoxometalates(POM)-based metal–organic complexes constructed from a new semi-rigid organic ligand N,N'-bis(4-pyrimidinecarboxamido)-1,2-cyclohexane(4-bpmah)H_(2)[Cu(4-bpmah)_(2)(SiMo_(12)O_(40))(H_(2)O)_(2)]·2H_(2)O(1),H[Cu(4-bpmah)_(2)(PMo_(12)O_(4)0)(H_(2)O)_(2)]·2H_(2)O(2)and[Cu(4-bpmah)(H_(2)O)_(2)]·[Cu_(2)(TeMo_(6)O_(24))(H_(2)O)_(10)]·4H_(2)O(3)were synthesized by hydrothermal *** crystal X-ray analyses showed that complexes 1 and 2 were isostructural,in which the isolated Keggin-type[SiMo1_(2)O_(40)]^(4–)/[PMo_(12)O_(40)]^(3–)anions and[Cu(4-bpmah)_(2)(H_(2)O)2]^(2n+)units were expanded into 3D supramolecular structures through hydrogen bond *** complex 3,the 1D[Cu(4-bpmah)(H_(2)O)_(2)]^(2n+)metal–organic chains and isolated[Cu_(2)(TeMo_(6)O_(24))(H_(2)O)_(10)]^(2n–)units were expanded into a 3D supramolecular framework by the hydrogen bond *** this paper,carbon cloth working electrodes composited by the title complexes(1/CC,2/CC and 3/CC)were prepared and used as electrodes for *** performance of supercapacitors as well as the influence of electrolyte solution and title complexes quality load on the performance of supercapacitors were ***,the electrochemistry and electrocatalytic behaviors of complexes 1–3 bulk-modified carbon paste electrodes(1-CPE,2-CPE and 3-CPE)toward the reduction of KBrO_(3),KNO_(2),Cr(Ⅵ),as well as their sensing behaviors on Cr(Ⅵ)were investigated.

关键词： Polyoxometalates Metal–organic complexes Supercapacitor Electrocatalysis Electrochemical sensors

Effect of Reaction Conditions on the Assembly, Structures and Fluorescent Sensing Behaviors of Cd（II） Metal-organic Complexes

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Chemical Research in Chinese Universities 2016年第1期32卷 8-15页

作者： LE Mao LUAN Jian ZHAO Xunzhang TANG Tang CHEN Panwen LIU Guocheng lin hongyan Department of Chemistry Bohai University Jinzhou 121013 P. R. China

Three Cd（II） metal-organic complexes, namely [Cd（phen）2Cl2]（1）, [Cd（phen）Cl2]（2） and [Cd（phen）（cam）]. H2O（3）（phen=1,10-phenanthroline, H2cam=camphoric acid）, were hydrothermally synthesized using Cd2＋, phen and Hacam as raw materials under different conditions of pH values, reaction temperatures or reactant ratios. The prepared complexes were structurally characterized by means of single-crystal X-ray diffraction, and the results show that complex 1 is a 2D supramolecular complex, which consists of [Cd（phen）2Cl2] mononuclear subunits, while complex 2 shows a 1D chain structure, in which Cd（II） ions are connected by chloride（Cl ） bridges, with phen hanging on both sides of the chain. No cam anions have been observed in the structures of complexes 1 and 2. In complex 3, cam connects Cd（lI） ions to construct a 2D network, in which phen acts as terminal ligands. The adjacent 1D chains for complex 2 and the adjacent 2D layers for complex 3 are further linked by hydrogen bonding interac- tions or π-π intermolecular interactions to form 3D supramolecular networks, respectively. The effects of reaction conditions on the assembly and structures of the complexes have been discussed. The fluorescent and photocatalytic properties of complexes 1-3 and the fluorescent sensing behaviors of complexes 2 and 3 have also been investigated.

关键词： Cd(II) complex 1,10-Phenanthroline Camphanic acid Fluorescent sensing behavior Photocatalytic property

Substituent groups from aromatic dicarboxylates modulated structural diversification in the assembly of Co(Ⅱ)complexes based on the bis-pyridyl-bis-amide ligands

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Science China Chemistry 2013年第5期56卷 557-566页

作者： WANG XiuLi MU Bao lin hongyan YANG Song LIU GuoCheng TIAN AiXiang ZHANG JuWen Department of Chemistry Bohai University

Four coordination polymers based on two bis-pyridyl-bis-amide ligands and three aromatic dicarboxylates with different substituent groups, namely, [Co（3-bpcb）x.5（NPH）（H20）]＂ 4H20 （1）, [Co（3-bpcb）（NIPH）] （2）, [Co（3-bpcb）0.5（5-H2AIP）]＂ 2H20 （3）, [Co（3-bpcd）0.5（5-H2AIP）（H20）]＂ 2H20 （4） [3-bpcb = N,N＇-bis（3-pyridinecarboxamide）-l,4-benzene, 3-bpcd = N,N＇-bis（3- pyridine）cyclohexane-l,4-dicarboxamide, H2NPH = 3-nitrophthalic acid, H2NIPH = 5-nitroisophthalic acid, 5-HaAIP = 5-aminoisophthalic acid] have been synthetized under hydrothermal conditions. Complex 1 displays a one dimensional （1D） chain based on the binuclear [Co2（NPH）2] units and 3-bpeb ligands, which is extended into a three dimensional （3D） supra- molecular framework through hydrogen bonding and n-n stacking interactions. In complex 2, the （3,5）-connected two dimen- sional （2D） layers are constructed from 1D Co-NIPH chains and bidentate-bridging 3-bpeb ligands. Complex 3 is a 2D double layer based on Co-5-H2AIP 2D layers and 3-bpeb pillars. Complex 4 also displays a 2D network, which is constructed from the Co-5-H2AIP 1D double chains and 3-bpcd ligands. Finally, complexes 2--4 are extended into 3D supramolecular frame- works by hydrogen bonding or n-re stacking interactions. The substituent groups of dicarboxylates play an important role in the assembly and structures of the title complexes. In addition, the fluorescent properties of complexes 1-4 and the electrochemi- cal behaviors of 3 and 4 at room temperature have been investigated.

关键词： coordination polymer bis-pyridyl-bis-amide ligand hydrothermal reaction fluorescent property