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1. Fluorination and chlorination effects on quinoxalineimides as an electron-deficient building block for n-channel organic semiconductors

Author:
Hasegawa, Tsukasa; Ashizawa, Minoru; Kawauchi, Susumu; Masunaga, Hiroyasu; Ohta, Noboru; Matsumoto, Hidetoshi
Source:
RSC advances 2019 v.9 no.19 pp. 10807-10813
ISSN:
2046-2069
Subject:
chlorine,   etc   ; chlorination; electric potential difference; fluorine; semiconductors;     Show all 5 Subjects
Abstract:
... The quinoxalineimide (QI) unit, containing the electron-withdrawing quinoxaline and imide groups, is an electron-deficient building block for organic semiconductor materials. In this study, three fluorinated or chlorinated QIs (QI-1F, QI-2F, and QI-2Cl), have been designed and developed. We report the impact of the fluorination or chlorination of the QI unit on the electronic structures and charge ...
DOI:
10.1039/c9ra02413a

2. Tailoring hydrogen separation performance through the ceramic lanthanum tungstate membranes by chlorine doping

Author:
Chen, Li; Liu, Lingfei; Xue, Jian; Zhuang, Libin; Wang, Haihui
Source:
Journal of membrane science 2019 v.573 pp. 117-125
ISSN:
0376-7388
Subject:
chlorine,   etc   ; artificial membranes; ceramics; hydrogen; lanthanum; permeability;     Show all 6 Subjects
Abstract:
... The influences of solid-state reaction and sol-gel synthesis methods on the permeability through the La5.5W0.6Mo0.4O11.25-δ membranes were investigated firstly. Then the superior sol-gel route was selected to synthesize chlorine-doped La5.5W0.6Mo0.4O11.25-δ-x/2Clx (LWMClx, x = 0–0.20) series membranes. The effects of chlorine doping on hydrogen separation performance through LWMClx hydrogen permea ...
DOI:
10.1016/j.memsci.2018.11.073

3. Halogenation of A-frame μ-carbido complexes: synthesis of μ₂-halocarbynes

Author:
Barnett, Harrison J.; Hill, Anthony F.
Source:
Chemical communications 2019 v.55 no.12 pp. 1734-1737
ISSN:
1364-548X
Subject:
chlorine,   etc   ; bromine; chemical communication; chemical reactions; ligands;     Show all 5 Subjects
Abstract:
... The reaction of [Rh₂(μ-C)Cl₂(PPh₃)₄] with bis(diphenylphosphino)methane (dppm) affords the A-frame μ-carbido complex [Rh₂(μ-C)Cl₂(μ-dppm)₂], halide metathesis of which provides [Rh₂(μ-C)Br₂(μ-dppm)₂]. The reactions of the former with PhICl₂ or the latter with [pyH][Br₃] provide rare examples of μ₂-halocarbyne ligands in the complexes [Rh₂(μ-CX)(μ-X)X₄(μ-dppm)₂] (X = Cl, Br). ...
DOI:
10.1039/c8cc09692a

4. Biobleaching of Kraft pulp using fungal xylanases produced from sugarcane straw and the subsequent decrease of chlorine consumption

Author:
Campioni, Tania Sila; de Jesus Moreira, Leandro; Moretto, Evandro; Sawada Nunes, Natalie Stephanie; de Oliva Neto, Pedro
Source:
Biomass and bioenergy 2019 v.121 pp. 22-27
ISSN:
0961-9534
Subject:
chlorine; chlorine dioxide,   etc   ; biobleaching; fungi; kraft pulp; pH; papermaking; scanning electron microscopy; straw; sugarcane; sugars; xylanases;     Show all 12 Subjects
Abstract:
... Xylanase extract, produced by T. reesei QM9414 in a culture with sugarcane straw (SS) as substrate, was studied in the biobleaching of Kraft pulp associated with chemical bleaching. The biobleaching parameters optimization showed that 30 U/g of xylanases, at pH 5, at 50 °C, during 30 min, are the best conditions to bleach the crude Kraft pulp (3% of consistency). lA decrease of 12.5% of Kappa numb ...
DOI:
10.1016/j.biombioe.2018.12.014

5. Removal of wastewater and polymer derived N-nitrosodimethylamine precursors with integrated use of chlorine and chlorine dioxide

Author:
Uzun, Habibullah; Kim, Daekyun; Karanfil, Tanju
Source:
Chemosphere 2019 v.216 pp. 224-233
ISSN:
0045-6535
Subject:
chlorine; chlorine dioxide,   etc   ; N-nitrosodimethylamine; byproducts; chlorates; chlorites; disinfection; oxidants; oxidation; pH; polymers; wastewater;     Show all 12 Subjects
Abstract:
... In this study, the effects of five different pre-oxidation scenarios (i.e., individual, simultaneous, and sequential applications of chlorine dioxide [ClO2] and chlorine [Cl2]) on the removal of N-nitrosodimethylamine (NDMA) formation potential (FP) from different water matrices (i.e., non-impacted natural waters, wastewater [WW]-impacted, and polymer-impacted waters) with subsequent chloraminatio ...
DOI:
10.1016/j.chemosphere.2018.10.088

6. Halogen Adsorption and Reaction with Bi2(Se,Te)3 and Bi/Bi2(Se,Te)3 C

Author:
Zhu, Haoshan; Zhou, Weimin; Yarmoff, Jory A.
Source:
Journal of physical chemistry 2018 v.122 no.28 pp. 16122-16131
ISSN:
1932-7455
Subject:
chlorine,   etc   ; adsorption; annealing; bismuth;     Show all 4 Subjects
Abstract:
... Bi₂Se₃ and Bi₂Te₃ and these same surfaces covered with Bi films are exposed to Br₂ and Cl₂ in ultrahigh vacuum. Low-energy electron diffraction and low-energy ion scattering are used to investigate the surface composition before and after halogen exposure. It is found that Br₂ weakly chemisorbs to the Se- or Te-terminated clean surfaces and light annealing removes the adsorbates restoring the inta ...
DOI:
10.1021/acs.jpcc.8b03920

7. A chemopalette strategy for white light by modulating monomeric and excimeric phosphorescence of a simple Cu(i) cyclic trinuclear unit

Author:
YangHu Yang and Ji Zheng contributed equally to this work., Hu; Zheng, Ji; Peng, Su-Kao; Zhu, Xiao-Wei; Wan, Meng-Yan; Lu, Weigang; Li, Dan
Source:
Chemical communications 2019 v.55 no.32 pp. 4635-4638
ISSN:
1364-548X
Subject:
chlorine,   etc   ; ambient temperature; chemical reactions; copper; phosphorescence; white light;     Show all 6 Subjects
Abstract:
... Room-temperature white phosphorescence with a quantum yield (QY) of 35.6% and a CIE coordinate of (0.33, 0.37) is observed for Cl-α, the crystal of cyclic Cu₃(4-chloropyrazolate)₃. Its white light consists of comparably uncommon monomeric blue and common excimeric yellow phosphorescence associated with Cu₃(pyrazolate)₃, achieved by multiple non-covalent interactions involving chlorine. ...
DOI:
10.1039/c9cc00716d

8. Development of a selective chloride sensing platform using a screen-printed platinum electrode

Author:
Cunha-Silva, Hugo; Julia Arcos-Martinez, M.
Source:
Talanta 2019 v.195 pp. 771-777
ISSN:
0039-9140
Subject:
chlorine,   etc   ; adsorption; anions; detection limit; electrochemistry; electrodes; platinum;     Show all 7 Subjects
Abstract:
... A new and selective voltammetric method for chloride determination is proposed, based on platinum and chloride interactions. A screen-printed platinum electrode (SPPtE) functions as a sensing platform, which promotes the formation of chloro-adsorbed species on the electrode surface, acting as an effective means of anion-determination in several matrices. The pretreatment of the SPPtE and careful c ...
DOI:
10.1016/j.talanta.2018.12.008

9. Investigation into reactions of methyl methacrylate and ethyl acrylate with chlorine atom

Author:
Lin, Xuan; Li, Zhaohui; Yu, Yepeng; Chen, Jun; Meng, Qinghui; Zhang, Hang; Shan, Xiaobin; Liu, Fuyi; Sheng, Liusi
Source:
Chemosphere 2019 v.221 pp. 263-269
ISSN:
0045-6535
Subject:
chlorine,   etc   ; energy; esters; gases; ionization; isomers; spectrometers; ultraviolet radiation;     Show all 8 Subjects
Abstract:
... Reactions between chlorine and unsaturated esters in gas phase are examined in a slow-flow reaction tube inside the laboratory-built photoionization mass spectrometer at the energy range of 8–11 eV. 248 nm laser radiation is used to initiate the reaction. Products are distinguished, C5H8O2Cl for addition, and C5H7O2, C5H7O2Cl and C5H9O2Cl for abstraction. The direct or indirect products are detect ...
DOI:
10.1016/j.chemosphere.2018.12.202

10. In situ Investigation of Water Interaction with Lead-Free All Inorganic Perovskite (Cs₂SnIₓCl₆–ₓ)

Author:
Zhu, Weiguang; Yao, Tiankai; Shen, Junhua; Xu, Wenqian; Gong, Bowen; Wang, Yachun; Lian, Jie
Source:
Journal of physical chemistry 2019 v.123 no.14 pp. 9575-9581
ISSN:
1932-7455
Subject:
chlorine,   etc   ; X-ray diffraction; anions; bromine; iodine; physical chemistry;     Show all 6 Subjects
Abstract:
... Hybrid halide perovskites display a great tunability of optoelectronic properties and environmental stability by controlling the halogen anions (e.g., I, Cl, and Br). However, their water interaction and degradation mechanisms are not fully elucidated. In this work, the interaction of Cs₂SnCl₆ and Cl-enriched solid solution Cs₂SnI₀.₉Cl₅.₁ with water was systematically studied by in situ synchrotro ...
DOI:
10.1021/acs.jpcc.9b00720

11. Synthesis of 4-Chloroisocoumarins via Intramolecular Halolactonization of o-Alkynylbenzoates: PhICl₂-Mediated C–O/C–Cl Bond Formation

Author:
Xing, Linlin; Zhang, Yong; Li, Bing; Du, Yunfei
Source:
Organic letters 2019 v.21 no.7 pp. 1989-1993
ISSN:
1523-7052
Subject:
chlorine,   etc   ; chemical bonding; chemical structure; cyclization reactions; organic compounds; oxidants;     Show all 6 Subjects
Abstract:
... A series of 4-chloroisocoumarins were conveniently synthesized from o-alkynylbenzoates via PhICl₂-mediated intramolecular cyclization under metal-free conditions. PhICl₂ plays the role of both the oxidant and the chlorine source to enable oxidative C–O bond formation and introduction of the chlorine atom. The utility and practicability of this protocol have been exemplified by virtue of mild react ...
DOI:
10.1021/acs.orglett.9b00047

12. Enhanced Performance of a CVD MoS₂ Photodetector by Chemical in Situ n-Type Doping

Author:
Li, Songyu; Chen, Xiaoqing; Liu, Famin; Chen, Yongfeng; Liu, Beiyun; Deng, Wenjie; An, Boxing; Chu, Feihong; Zhang, Guoqing; Li, Shanlin; Li, Xuhong; Zhang, Yongzhe
Source:
ACS applied materials & interfaces 2019 v.11 no.12 pp. 11636-11644
ISSN:
1944-8252
Subject:
chlorine,   etc   ; electric potential difference; electrons; gold; molybdenum disulfide; vapors;     Show all 6 Subjects
Abstract:
... Transition metal dichalcogenides (TMDs) are a category of promising two-dimensional (2D) materials for the optoelectronic devices, and their unique characteristics include tunable band gap, nondangling bonds as well as compatibility to large-scale fabrication, for instance, chemical vapor deposition (CVD). MoS₂ is one of the first TMDs that is well studied in the photodetection area widely. Howeve ...
DOI:
10.1021/acsami.9b00856

13. Investigation of Poly(ethersulfone)/Polyvinylpyrrolidone ultrafiltration membrane degradation by contact with sodium hypochlorite through FTIR mapping and two-dimensional correlation spectroscopy

Author:
Chokki, J.; Darracq, G.; Poelt, P.; Baron, J.; Gallard, H.; Joyeux, M.; Teychené, B.
Source:
Polymer degradation and stability 2019 v.161 pp. 131-138
ISSN:
0141-3910
Subject:
chlorine,   etc   ; Fourier transform infrared spectroscopy; oxidation; pH; sodium hypochlorite; ultrafiltration;     Show all 6 Subjects
Abstract:
... It is well recognized that chlorine is responsible for aging of membrane materials. The goal of this study is to investigate the modifications of a commercial PES/PVP hollow fiber membrane exposed to hypochlorite solution at pH 7.5 by continuous filtration. Thanks to ATR-FTIR 2D Correlation Spectroscopy (2DCoS) analysis it was confirmed that PVP is oxidized into succinimide compound. 2DCoS analysi ...
DOI:
10.1016/j.polymdegradstab.2019.01.017

14. Sunlight caused interference in outdoor N, N-diethyl-p-phenylenediamine colorimetric measurement for residual chlorine and the solution for on-site work

Author:
Li, Peng; Yoshimura, Takeshi; Furuta, Takeshi; Yanagawa, Toshiharu; Shiozaki, Keiko; Kobayashi, Takuya
Source:
Ecotoxicology and environmental safety 2019 v.169 pp. 640-644
ISSN:
0147-6513
Subject:
chlorine,   etc   ; chlorination; color; colorimetry; solar radiation; ultraviolet radiation; wavelengths;     Show all 7 Subjects
Abstract:
... Chlorination is the most common method to control water qualities, in some case on-site outdoor measurements are required to measure easily-decaying residual chlorine concentration appropriately without delay. In this study sunlight-induced unexpected colour development (UCD) of N, N-diethyl-p-phenylenediamine (DPD) colorimetric measurement was studied under several sun exposure conditions. The co ...
DOI:
10.1016/j.ecoenv.2018.11.055

15. Grinding Synthesis of APbX₃ (A = MA, FA, Cs; X = Cl, Br, I) Perovskite Nanocrystals

Author:
Chen, Daqin; Li, Junni; Chen, Xiao; Chen, Jiangkun; Zhong, Jiasong
Source:
ACS applied materials & interfaces 2019 v.11 no.10 pp. 10059-10067
ISSN:
1944-8252
Subject:
chlorine,   etc   ; bromine; color; diodes; emissions; grinding; iodine; nanocrystals; photoluminescence; temperature;     Show all 10 Subjects
Abstract:
... Currently, metal halide perovskite nanocrystals have been extensively explored due to their unique optoelectronic properties and wide application prospects. In the present work, a facile grinding method is developed to prepare whole-family APbX₃ (A = MA, FA, and Cs; X = Cl, Br, and I) perovskite nanocrystals. This strategy alleviates the harsh synthesis conditions of precursor dissolution, atmosph ...
DOI:
10.1021/acsami.8b19002

16. Superconductivity in Bi₃O₂S₂Cl with Bi–Cl Planar Layers

Author:
Ruan, Bin-Bin; Zhao, Kang; Mu, Qing-Ge; Pan, Bo-Jin; Liu, Tong; Yang, Huai-Xin; Li, Jian-Qi; Chen, Gen-Fu; Ren, Zhi-An
Source:
Journal of the American Chemical Society 2019 v.141 no.8 pp. 3404-3408
ISSN:
1520-5126
Subject:
chlorine,   etc   ; bismuth; crystals; halides; semiconductors; sulfur; superconductivity; temperature;     Show all 8 Subjects
Abstract:
... A quaternary compound Bi₃O₂S₂Cl, which consists of novel [BiS₂Cl]²– layers, is reported. It adopts a layered structure of the space group I4/mmm (No. 139) with lattice parameters: a = 3.927(1) Å, c = 21.720(5) Å. In this compound, bismuth and chlorine atoms form an infinite planar layer, which is unique among the bismuth halides. Superconductivity is observed in both polycrystals and single crysta ...
DOI:
10.1021/jacs.8b13796

17. Ruthenium(II) Acetate Catalyzed Synthesis of Silylated Oxazoles via C–H Silylation and Dehalogenation

Author:
Liu, Shun; Zhang, Shiling; Lin, Qiao; Huang, Yiqi; Li, Bin
Source:
Organic letters 2019 v.21 no.4 pp. 1134-1138
ISSN:
1523-7052
Subject:
chlorine,   etc   ; bromine; dehalogenation; moieties; oxazoles; regioselectivity; ruthenium; silylation;     Show all 8 Subjects
Abstract:
... An efficient ruthenium(II)-catalyzed intermolecular selective ortho C–H silylation of 2-aryloxazoles has been described for the first time, which provides a convenient and practical pathway for the synthesis of versatile organosilane compounds with good functional group tolerance and regioselectivity. This catalytic system could be also applied to the dehalogenation of Cl or Br group. ...
DOI:
10.1021/acs.orglett.9b00085

18. Congener-specific C10C13 and C14C17 chlorinated paraffins in Chinese agricultural soils: Spatio-vertical distribution, homologue pattern and environmental behavior

Author:
Aamir, Muhammad; Yin, Shanshan; Zhou, Yuting; Xu, Chenye; Liu, Kai; Liu, Weiping
Source:
Environmental pollution 2019 v.245 pp. 789-798
ISSN:
0269-7491
Subject:
chlorine,   etc   ; agricultural land; agricultural soils; alkanes; carbon; spatial distribution; surveys;     Show all 7 Subjects
Abstract:
... A comprehensive spatio-vertical survey of short-chain (SCCPs, C10-13) and medium-chain (MCCPs, C14-17) chlorinated paraffins (CPs) was performed in surface and core soils from Chinese nation-wide agricultural lands in 2016, and a total of 48 congener groups were measured. The shorter carbon chain C10-11 in SCCP and C14-15 in MCCP homologue groups, and the lower chlorinated congeners (Cl5-7) for bo ...
DOI:
10.1016/j.envpol.2018.10.132

19. Towards improved efficiency of polymer solar cells via chlorination of a benzo[1,2-b:4,5-b′]dithiophene based polymer donor

Author:
Dong, Yingying; Yang, Hang; Wu, Yue; Zou, Yan; Yuan, Jianyu; Cui, Chaohua; Li, Yongfang
Source:
Journal of materials chemistry A 2019 v.7 no.5 pp. 2261-2267
ISSN:
2050-7496
Subject:
chlorine,   etc   ; chlorination; fluorine; polymers; solar cells; solvents; spectral analysis; xylene;     Show all 8 Subjects
Abstract:
... A chlorine substituted benzo[1,2-b:4,5-b′]dithiophene unit based conjugated polymer, PBT-Cl, is designed and synthesized as a donor material for high-performance polymer solar cells (PSCs). Relative to its fluorine substituted counterpart PBT-F, PBT-Cl has a simple synthetic procedure, slightly blue-shifted absorption spectrum, and lower-lying HOMO level. Importantly, the PSC based on PBT-Cl : IT- ...
DOI:
10.1039/c8ta10923k

20. In situ preparation of C–SiCₓOy coatings with controllable composition on continuous oxygen-enriched SiC fibres

Author:
Xu, Haonan; Wang, Qi; Xiao, Hongrui; Li, Xiangdong; Su, Xiaohui; Tang, Ming; Chen, Lifu; Li, Siwei
Source:
RSC advances 2019 v.9 no.3 pp. 1319-1326
ISSN:
2046-2069
Subject:
chlorine,   etc   ; carbon; chlorination; coatings; electrical properties; silicon carbide; temperature;     Show all 7 Subjects
Abstract:
... Oxygen-enriched SiC fibres derived from polycarbosilane are exposed to chlorine at 500 to 750 °C for up to 60 min. After chlorination, uniform coatings with controllable thickness are formed in situ on the SiC fibres. Evolution of the coating composition and its relation to the electrical properties are investigated. Results indicate that the porous nature of the coating realizes a reaction-contro ...
DOI:
10.1039/c8ra09095e