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1. Lead chlorine cluster assembled one-dimensional halide with highly efficient broadband white-light emission

Author:
Zhao, Jian-Qiang; Sun, Chen; Yue, Meng; Meng, Yan; Zhao, Xian-Mei; Zeng, Le-Ran; Chen, Guang; Yue, Cheng-Yang; Lei, Xiao-Wu
Source:
Chemical communications 2021 v.57 no.10 pp. 1218-1221
ISSN:
1364-548X
Subject:
chlorine,   etc   ; lead; white light;     Show all 3 Subjects
Abstract:
... One new type of hybrid lead halide of [DTHPE]₂Pb₃Cl₁₀ has been synthesized and characterized containing a one-dimensional (1D) wavelike [Pb₃Cl₁₀]⁴⁻ chain based on a corner-shared [Pb₃Cl₁₁] cluster. Remarkably, this cluster-based 1D chain displays intrinsic broadband white light emission with a high quantum efficiency of 19.45% exceeding those of previously reported typical two-dimensional perovski ...
DOI:
10.1039/d0cc05570k

2. Can a gas phase contact ion pair containing a hydrocarbon carbocation be formed in the ground state?

Author:
Araújo, José R.; de Andrade, Railton B.; Batista, Hélcio J.; Ventura, Elizete; do Monte, Silmar A.
Source:
RSC advances 2021 v.11 no.7 pp. 4221-4230
ISSN:
2046-2069
Subject:
chlorine,   etc   ; chlorides; spectroscopy;     Show all 3 Subjects
Abstract:
... So far, no conclusive evidence of a ground-state contact ion-pair containing a hydrocarbon carbocation has been given in the gas phase. Due to the very high stability of the 1,2:4,5-dibenzotropylium (or dibenzo[a,d]tropylium) carbocation, we suggest (supported by DFT and MP2 calculations) the formation of a contact ion pair between this carbocation and chloride, occurring during the reaction betwe ...
DOI:
10.1039/d0ra10523f

3. Tertiary amine-catalyzed generation of chlorine dioxide from hypochlorous acid and chlorite ions

Author:
Isaza Ferro, Estefania; Perrin, Jordan; Dawson, Owain George John; Vuorinen, Tapani
Source:
Wood science and technology 2021 v.55 no.1 pp. 67-81
ISSN:
0043-7719
Subject:
chlorine; chlorine dioxide,   etc   ; catalysts; chlorides; pH; technology; wood;     Show all 7 Subjects
Abstract:
... The reaction between hypochlorous acid and chlorite ions is the rate limiting step for in situ chlorine dioxide regeneration. The possibility of increasing the speed of this reaction was analyzed by the addition of tertiary amine catalysts in the system at pH 5. Two amines were tested, DABCO (1,4-diazabicyclo[2.2.2]octane) and its derivative CEM-DABCO (1-carboethoxymethyl-1-azonia-4-aza-bicyclo[2. ...
DOI:
10.1007/s00226-020-01247-5

4. Effect of concentration on virus removal for ultrafiltration membrane in drinking water production

Author:
Jacquet, N.; Wurtzer, S.; Darracq, G.; Wyart, Y.; Moulin, L.; Moulin, P.
Source:
Journal of membrane science 2021 v.634 pp. 119417
ISSN:
0376-7388
Subject:
chlorine,   etc   ; bacteriophages; groundwater; permeability; ultrafiltration;     Show all 5 Subjects
Abstract:
... Removal of pathogenic microorganisms as viruses during drinking water production was evaluated by ultrafiltration. Two enteric viruses (ADV 41 and CV-B5) were compared to the MS2 bacteriophage, largely used in literature and by membrane producers as enteric virus surrogate. The effect of feed concentration of viruses on the ultrafiltration efficiency has been assessed. For the three viruses, low r ...
DOI:
10.1016/j.memsci.2021.119417

5. Tunable Optical Features of Graphene Quantum Dots from Edge Functionalization

Author:
Sheely, Andrew; Gifford, Brendan; Tretiak, Sergei; Bishop, Alan
Source:
Journal of physical chemistry 2021 v.125 no.17 pp. 9244-9252
ISSN:
1932-7455
Subject:
chlorine,   etc   ; geometry; graphene; semiconductors; solubility;     Show all 5 Subjects
Abstract:
... Graphene quantum dots (GQDs) are promising semiconducting materials for practical applications. Chemical functionalization of GQD edges is a strategy to increase their solubility and processability and to modify their optical properties. Such functionalization has a twofold effect on the electronic structure, both attributed to electronic spatial localization. The first is relevant to the introduc ...
DOI:
10.1021/acs.jpcc.1c00537

6. Chlorination Reaction of Aromatic Compounds and Unsaturated Carbon–Carbon Bonds with Chlorine on Demand

Author:
Liu, Feng; Wu, Na; Cheng, Xu
Source:
Organic letters 2021 v.23 no.8 pp. 3015-3020
ISSN:
1523-7052
Subject:
chlorine,   etc   ; alkenes; chlorides; chlorination; electrochemistry;     Show all 5 Subjects
Abstract:
... Chlorination with chlorine is straightforward, highly reactive, and versatile, but it has significant limitations. In this Letter, we introduce a protocol that could combine the efficiency of electrochemical transformation and the high reactivity of chlorine. By utilizing Cl₃CCN as the chloride source, donating up to all three chloride atom, the reaction could generate and consume the chlorine in ...
DOI:
10.1021/acs.orglett.1c00704

7. Simplified source description for atmospheric dispersion model comparison of the Jack Rabbit II chlorine field experiments

Author:
Spicer, Thomas O.; Tickle, Graham
Source:
Atmospheric environment 2021 v.244 pp. 117866
ISSN:
1352-2310
Subject:
chlorine,   etc   ; environment; hares; momentum; thermodynamics;     Show all 5 Subjects
Abstract:
... This paper provides a summary of the methods used to quantify the mass release rate and thermodynamic state of the chlorine released during the Jack Rabbit II chlorine field experiments. In the two-year campaign, eight successful field trials were conducted in which chlorine was released in quantities of 5–10 tons (4540–9070 kg) through a 6-inch (0.152 m) circular breach in the test vessel (dissem ...
DOI:
10.1016/j.atmosenv.2020.117866

8. The role of carbonate radicals on the kinetics, radical chemistry, and energy requirement of UV/chlorine and UV/H2O2 processes

Author:
Zhu, Shumin; Tian, Zaochen; Wang, Pin; Zhang, Weiqiu; Bu, Lingjun; Wu, Yangtao; Dong, Bingzhi; Zhou, Shiqing
Source:
Chemosphere 2021 v.278 pp. 130499
ISSN:
0045-6535
Subject:
chlorine,   etc   ; bicarbonates; carbonates; chemistry; energy; kinetics; models;     Show all 7 Subjects
Abstract:
... Quantitative insight into the HCO₃⁻-dependent degradation kinetics is critical to improve understanding of the UV processes for the most-cost effective application. In this study, we developed a kinetic model to precisely predict the kinetics in UV/H₂O₂ and UV/chlorine processes. The second-order rate constants of HO, Cl, ClO, Cl₂⁻, and CO₃⁻ with carbamazepine (CBZ) were fitted as 1.3 × 10⁹, 1.9 × ...
DOI:
10.1016/j.chemosphere.2021.130499

9. Abiotic oxidation of arsenite in natural and engineered systems: Mechanisms and related controversies over the last two decades (1999–2020)

Author:
Wang, Zhaohui; Fu, Yu; Wang, Lingli
Source:
Journal of hazardous materials 2021 v.414 pp. 125488
ISSN:
0304-3894
Subject:
chlorine,   etc   ; arsenic; arsenites; decontamination; oxidation; ozone; toxicity;     Show all 7 Subjects
Abstract:
... Abiotic oxidation of toxic As(III) to As(V) is being deemed as a necessary step for the overall arsenic decontamination in both natural and engineered systems. Direct oxidation of As(III) by chemical oxidants, such as ozone, permanganate, ferrate, chlorine and chloramine, or naturally occurring minerals like Mn, Fe oxides, seems straightforward. Both O₂ and H₂O₂ are ineffective for arsenite oxidat ...
DOI:
10.1016/j.jhazmat.2021.125488

10. Transformation from Rod-Like to Diamond-Like Micelles by Thermally Induced Nucleation Self-Assembly

Author:
Li, Heng; Han, Liang; Zhu, Yulin; Fernández-Trillo, Paco; He, Feng
Source:
Macromolecules 2021 v.54 no.11 pp. 5278-5285
ISSN:
1520-5835
Subject:
chlorine,   etc   ; composite polymers; micelles; temperature; thermodynamics;     Show all 5 Subjects
Abstract:
... Precisely controlled organic one-dimensional (1D) and two-dimensional (2D) materials with unique optoelectronic properties have attracted wide interests. By the introduction of chlorine into the poly(p-phenylenevinylene) (PPV) core, we produced a series of 1D rod-like micelles, whose sizes were controlled by the concentrations of solutions, using self-assembly (SA) of conjugated copolymers (PPV–Cl ...
DOI:
10.1021/acs.macromol.1c00744

11. Biodegradation of trichlorobiphenyls and their hydroxylated derivatives by Rhodococcus-strains

Author:
Gorbunova, Tatyana I.; Egorova, Darya O.; Pervova, Marina G.; Kyrianova, Tatyana D.; Demakov, Vitalyi A.; Saloutin, Victor I.; Chupakhin, Oleg N.
Source:
Journal of hazardous materials 2021 v.409 pp. 124471
ISSN:
0304-3894
Subject:
chlorine,   etc   ; aroclors; biodegradation; carbon dioxide; hydroxylation; metabolites;     Show all 6 Subjects
Abstract:
... A possibility of using a complex approach is considered to explain features of biodestruction of polychlorinated biphenyls (PCBs), which are known to be persistent organic pollutants. The approach comprises the following main stages: (i) chemical modification of chloroarenes by hydroxylation and (ii) bacterial degradation of the hydroxylated derivatives. This approach is applicable to individual t ...
DOI:
10.1016/j.jhazmat.2020.124471

12. Structural similarity induced improvement in the performance of organic solar cells based on novel terpolymer donors

Author:
Cheng, Yujun; Jin, Hui; Oh, Jiyeon; Huang, Xuexiang; Lv, Ruizhi; Huang, Bin; Ma, Zaifei; Yang, Changduk; Chen, Lie; Chen, Yiwang
Source:
Journal of materials chemistry A 2021 v.9 no.14 pp. 9238-9247
ISSN:
2050-7496
Subject:
chlorine,   etc   ; absorption; copolymerization; energy; polymers; thermal stability;     Show all 6 Subjects
Abstract:
... Terpolymers have been proven to be promising polymer donors for organic solar cells (OSCs). However, the aperiodic sequence distribution caused by random copolymerization dramatically interrupts the orderly stacking of the conjugated main chain. In this work, we reported three terpolymers by introducing Si and Cl functionalized benzodithiophene (BDT-SiCl) into a polymer PM6 matrix with F functiona ...
DOI:
10.1039/d1ta00971k

13. Copper Catalyzed C(sp³)–H Bond Alkylation via Photoinduced Ligand-to-Metal Charge Transfer

Author:
Treacy, Sean M.; Rovis, Tomislav
Source:
Journal of the American Chemical Society 2021 v.143 no.7 pp. 2729-2735
ISSN:
1520-5126
Subject:
chlorine,   etc   ; alkenes; alkylation; catalysts; diastereoselectivity; hydrogen; oxidants;     Show all 7 Subjects
Abstract:
... Utilizing catalytic CuCl₂ we report the functionalization of numerous feedstock chemicals via the coupling of unactivated C(sp³)–H bonds with electron-deficient olefins. The active cuprate catalyst undergoes Ligand-to-Metal Charge Transfer (LMCT) to enable the generation of a chlorine radical which acts as a powerful hydrogen atom transfer reagent capable of abstracting strong electron-rich C(sp³) ...
DOI:
10.1021/jacs.1c00687

14. Degradation of cyclohexanecarboxylic acid as a model naphthenic acid by the UV/chlorine process: Kinetics and by-products identification

Author:
Abdalrhman, Abdallatif Satti; Wang, Chengjin; How, Zuo Tong; Gamal El-Din, Mohamed
Source:
Journal of hazardous materials 2021 v.402 pp. 123476
ISSN:
0304-3894
Subject:
chlorine,   etc   ; cyclohexanecarboxylic acid; hydroxyl radicals; naphthenates; photolysis;     Show all 5 Subjects
Abstract:
... Degradation kinetics, by-products identification and pathways of a model naphthenic acid, cyclohexanecarboxylic acid (CHA), by the UV/Chlorine process were investigated in this study. Mathematical modeling indicated that the initial CHA decay rate increased rapidly with the chlorine dose when the chlorine dose was lower than 45 mg/L and decreased with further chlorine dose increases. Increasing th ...
DOI:
10.1016/j.jhazmat.2020.123476

15. Investigation of particle-specific characteristics of non-hazardous, fine shredded mixed waste

Author:
Weissenbach, Thomas; Sarc, Renato
Source:
Waste management 2021 v.119 pp. 162-171
ISSN:
0956-053X
Subject:
chlorine,   etc   ; ash content; databases; waste management; wastes;     Show all 5 Subjects
Abstract:
... The smart waste factory of the future will be monitored and controlled by a combination of various sensors and several real-time data sets. One essential data requirement relates to waste streams at different stages of the treatment process. In order to analyse waste by sensor-based technology, a solid database of representative waste data is necessary. Usually, this data is collected of mixed was ...
DOI:
10.1016/j.wasman.2020.09.033

16. Monitoring of chlorine decay in public swimming pools in Medellín (Colombia)

Author:
Oviedo, Lía; Lopera, Laura; Lara, Paula A.; Castrillón, Fernando; Peñuela, Gustavo A.
Source:
Environmental monitoring and assessment 2021 v.193 no.1 pp. 10
ISSN:
0167-6369
Subject:
chlorine,   etc   ; disinfectants; pH; quality control; temperature; Colombia;     Show all 6 Subjects
Abstract:
... The present work shows the evaluation of the decay of free residual chlorine in several public swimming pools in the city of Medellín, observing that a decrease in residual chlorine does occur. Some factors accelerate the decrease in the concentration of free residual chlorine in recreational water, such as the number of bathers in the pool, the pH, and the temperature of the water. For this reaso ...
DOI:
10.1007/s10661-020-08779-0

17. Comparative evaluation of 2-isopropyl-3-methoxypyrazine, 2-isobutyl-3-methoxypyrazine, and 2,4,6-trichloroanisole degradation by ultraviolet/chlorine and ultraviolet/hydrogen peroxide processes

Author:
Lee, Juwon; Nam, Sook-Hyun; Koo, Jae-Wuk; Kim, Eunju; Hwang, Tae-Mun
Source:
Chemosphere 2021 v.279 pp. 130513
ISSN:
0045-6535
Subject:
chlorine,   etc   ; hydrogen peroxide; odors; oxidants; pH; photolysis; taste; water treatment;     Show all 8 Subjects
Abstract:
... 2-Isopropyl-3-methoxypyrazine (IPMP), 2-Isobutyl-3-methoxypyrazine (IBMP), and 2,4,6-Trichloroanisole (TCA) are the primary emerging taste and odor (T&O) compounds in water systems with low thresholds (ng L⁻¹). The selected T&O compounds are known to be difficult to remove using conventional water treatment processes. In this study, we compared the removal characteristics of the three T&O compound ...
DOI:
10.1016/j.chemosphere.2021.130513

18. Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination

Author:
Lopez-Prieto, Israel J.; Park, Minkyu; AzadiAghdam, Mojtaba; Pan, Hongrui; Jones, Sara L.; Snyder, Shane A.
Source:
Chemosphere 2021 v.278 pp. 130394
ISSN:
0045-6535
Subject:
chlorine,   etc   ; chlorination; disinfection; iodine; oxidation; ozone; ultraviolet radiation;     Show all 7 Subjects
Abstract:
... Different groups of disinfection by-products (DBPs) were studied through the degradation of iopamidol by the sequential oxidation process of ozone-low pressure ultraviolet light (O₃-LPUV) followed by chlorination. This paper investigates the attenuation of iopamidol under this sequential treatment and the effect of chlorine contact time (30 min versus 3 days) to control the formation potential of ...
DOI:
10.1016/j.chemosphere.2021.130394

19. Solar photo-assisted electrochemical processes applied to actual industrial and urban wastewaters: A practical approach based on recent literature

Author:
Salmerón, I.; Oller, I.; Malato, S.
Source:
Chemosphere 2021 v.279 pp. 130560
ISSN:
0045-6535
Subject:
chlorine,   etc   ; ammonium; electrochemistry; industrial wastewater; irradiation; mineralization; pH; wastewater treatment;     Show all 8 Subjects
Abstract:
... The application of electrochemical processes for wastewater treatment has increase significantly in the last two decades. However, most of the works are focused on lab-scale systems testing in saline simulated solutions spiked with a reference organic compound, evidencing the scarcity of studies on actual wastewaters through a more realistic practical approach. The aim of the present work is asses ...
DOI:
10.1016/j.chemosphere.2021.130560

20. Chlorine isotope analysis of polychlorinated organic pollutants using gas chromatography-high resolution mass spectrometry and evaluation of isotope ratio calculation schemes by experiment and numerical simulation

Author:
Tang, Caiming; Tan, Jianhua; Tang, Caixing; Liu, Huachun; Zhang, Peilin; Liu, Deyun; Peng, Xianzhi
Source:
Journal of chromatography 2021 v.1651 pp. 462311
ISSN:
0021-9673
Subject:
chlorine,   etc   ; chemical species; isotopes; mathematical models; standard deviation; tetrachloroethylene; trichloroethylene;     Show all 7 Subjects
Abstract:
... Compound-specific isotope analysis of chlorine (CSIA-Cl) is a practicable and high-performance approach for revelation of transformation processes and source identification of chlorinated organic pollutants. This study conducted CSIA-Cl for typical polychlorinated organic pollutants using gas chromatography-high resolution mass spectrometry (GCHRMS) with an alternate injection mode using perchloro ...
DOI:
10.1016/j.chroma.2021.462311