Three-Dimensional Cuprous Iodide Framework with Intrinsic Broadband Red-to-Near-Infrared Light Emission.

Herein, a new organic-inorganic hybrid cuprous iodide of [(Me)2-DABCO]Cu6I8 was prepared and structurally characterized with a novel three-dimensional (3D) [Cu6I8]2- framework. Significantly, this 3D cuprous iodide displays infrequent broadband red-to-near-infrared light emission (600-1000 nm) stemming from the radiative recombination of self-trapped excitons.

[Analysis of Heavy Metal Sources in Farmland Soil of Sewage Irrigation and Industrial Complex Area Based on APCS-MLR and PMF].

The contents of eight heavy metals （Cr, Ni, Cu, Zn, Cd, Pb, As, and Hg） were determined based on the surface soil samples of sewage irrigation and industrial complex in Kaifeng City. The absolute factor analysis-multiple linear regression （APCS-MLR） model and positive matrix factorization （PMF） model were used to analyze the sources and contribution rates of heavy metals in soil combined with correlation analysis and systematic cluster analysis. The results showed that： ① The average values of ω（Cr）, ω（Ni）, ω（Cu）, ω（Zn）, ω（Cd）, ω（Pb）, ω（As）, and ω（Hg） in the study area were 52.19, 25.00, 42.03, 323.53, 1.79, 53.45, 9.43, and 0.20 mg·kg-1, respectively, and Cr, Ni, and As are lower than the background values of tidal soil. Cu, Zn, Cd, Pb, and Hg are higher than the background values of the tidal soil. ② There were four sources of the eight heavy metals： natural sources, agricultural sewage irrigation sources, industrial atmospheric sedimentation sources, and transportation sources. Cr and Ni were mainly from natural sources； Cu, Zn, Cd, and Pb were mainly from agricultural sewage irrigation and transportation sources； As was mainly from natural sources and agricultural sewage irrigation； and Hg was mainly from industrial atmospheric sedimentation. ③ The APCS-MLR and PMF source analysis results indicated that industrial and agricultural activities were the main sources of heavy metals in the soil of the study area. The average contribution rates of APCS-MLR in the nine sampling areas of the research area were 76.01% （natural sources and agricultural sewage irrigation sources）, 22.71% （industrial atmospheric sedimentation sources and transportation sources）, and 1.28% （unknown sources）. The average contribution rates of PMF were 59.66% （natural sources and agricultural sewage irrigation sources） and 40.34% （industrial atmospheric sedimentation sources and transportation sources）. The source analysis results of the LZ, XZ, NLT, PT, YLZ, and BC models were basically consistent, and WL was better in the APCS-MLR model, whereas SG and QT were better in the PMF model. The research results can provide a scientific basis for the prevention and control of soil heavy metal pollution and environmental remediation.

[Emission Inventory and Distribution Characteristics of Anthropogenic Ammonia in Quzhou County, North China Plain].

Quzhou county is a county in the North China Plain with intensive agricultural production. Based on data collected on the local anthropogenic activity level and the ammonia (NH3) emission factor, the anthropogenic NH3 emission inventory in Quzhou county from 2002 to 2019 was established using the emission factor method, and the NH3 emission inventory in 2019 was optimized using the locally measured nitrogen (N) fertilizer application NH3 emission factor and activity data from farmer surveys. We found that the total NH3 emission in Quzhou county showed a bimodal pattern: it increased from 6682.9 t in 2002 to 7195.0 t in 2004 and then decreased to 5872.0 t in 2008. The second peak occurred in 2015 (7010.5 t) and then gradually decreased to 5636.3 t in 2018. Livestock husbandry (61%-75%) and N fertilizer application (14%-28%) were the primary NH3 emission sources. In 2019, the total NH3 emission in Quzhou county was 6559.7 t, of which N fertilizer application and livestock husbandry contributed 28% and 61%, respectively. Wheat planting contributed the highest NH3 emissions, accounting for 40% of the total NH3 emission of crop production. Laying hens had the largest NH3 emission in livestock production, contributing 40% of the total emissions. NH3 emissions were higher in the south than those in the north at the county level, with the average NH3 emission intensity reaching 13.5 t·km-2. Nanliyue and Baizhai towns were hot spots of NH3 emission. Taken together NH3 emission reduction in wheat production and layer hen breeding will help to control atmospheric NH3 pollution in the North China Plain.

Enhancement of the photoluminescence efficiency of hybrid manganese halides through rational structural design.

Five new zero-dimensional hybrid manganese halides based on discrete [MnCl4]2- tetrahedrons were prepared and used as highly efficient green-light emitters. Through rational management of organic cations to tailor the MnMn separation distances between neighboring [MnCl4]2- tetrahedrons, the photoluminescence quantum yield increased significantly from 7.98% to 81.11%.

Bis[4-(chloro-acet-yl)phenyl] ether.

The title compound, C(16)H(12)Cl(2)O(3), crystallizes with two independent mol-ecules in the asymmetric unit. The dihedral angles between the planes of the benzene rings in the two independent mol-ecules are 68.65 (2) and 68.47 (3)°. The short distance of 3.899 (5) Šbetween the centroids of the benzene rings of neighbouring mol-ecules indicate π-π inter-actions. The crystal structure is stabilized by a network of intermolecular C-H⋯O hydrogen bonds.

(5,5'-Dicarboxy-biphenyl-2,2'-dicarboxyl-ato-κO,O)bis-(1,10-phenanthroline-κN,N')zinc(II) dihydrate.

In the title compound, [Zn(C(16)H(8)O(8))(C(12)H(8)N(2))(2)]·2H(2)O, the Zn(II) atom is located on a twofold rotation axis and is six-coordinated by two O atoms from a 5,5'-dicarboxy-biphenyl-2,2'-dicarboxyl-ate ligand and four N atoms from two 1,10-phenanthroline mol-ecules in a distorted octa-hedral geometry. The crystal structure involves O-H⋯O hydrogen bonds.

[Study on Cellular Immunity Mechanisms of Suspended Moxibustion for Treating Neutrophilic Asthma in Rats].

OBJECTIVE: To observe the influence of suspended moxibustion on neutrophilic asthma related signal factors in asthma rats. METHODS: Thirty-two SD rats were randomly divided into normal control, model, dexamethasone(DEX) and suspended moxibustion (MOX) groups, with 8 rats in each group. The neutrophil granulocyte asthma model was made by intranasal instillation of lipopolysaccharide (LPS), intraperitoneal injection of ovalbumin(OVA) and inhalation of OVA, once a day for 14 d. After modeling, rats of the DEX group received intraperitoneal injection of DEX (0.5 mg/kg), once daily for 14 d, and those of the MOX group treated by suspended MOX at "Danzhong" (CV 17), and bilateral "Feishu" (BL 13), "Pishu" (BL 20), and "Shen-shu" (BL 23) for 40 min, once a day, for 14 d. The total number of leukocytes and Wright's stain-displayed differential counts in the bronchoalveolar lavage fluid (BALF) were counted, and the content of IL-17 in the BALF was assayed by ELISA. The contents of T-helper 17 (Th 17) cells in the spleen and peripheral blood were detected using flow cytometry, and the expression of retinoic acid-related orphan receptor gamma t (ROR-γt) mRNA and protein in the inferior lobe of the right lung were detected by quantitative real-time PCR, immunohistochemical stain and Western blot, respectively. RESULTS: Compared with the normal control group, the total number of leukocytes, the percentages of neutrophils, eosinophilis and lymphcytes and IL-17 content in the BALF, and Th 17 contents in the peripheral blood and spleen tissue were significantly increased in the model group (P<0.01). After the treatment, the total numbers of leukocytes, the percentages of neutrophils, eosinophils and lymphocytes and IL-17 contents in the BALF, and Th 17 contents in the peripheral blood and spleen tissues were down-regulated considerably in both the DEX and MOX groups (P<0.05, P<0.01). Immunohistochemical stain, real-time PCR and Western blot measurements showed that the expression levels of ROR-γt protein and mRNA in the lung tissues were notably higher in the model group than in the normal control group (P<0.01), and significantly down-regulated in both DEX and MOX groups relevant to the model group (P<0.05, P<0.01). No significant differences were found between the DEX and MOX groups in all the aforementioned indexes (P<0.05), except plasma Th 17 (P<0.05). CONCLUSIONS: Suspended moxibustion, being comparable to DEX treatment, can reduce the inflammatory reactions of neutrophilic asthma rats by down-regulating the expression of ROR -γt in the lung, and lowering IL-17 and neutrophils levels in the airway, and Th 17 in the peripheral blood and spleen.