A layered coordination polymer, [Ce(L)(H₂O)₄]_n (1), was synthesized by hydrothermal method by the reaction of 5⁃sulfoisophthalic acid monosodium salt (NaH₂L) with cerium nitrate hexahydrate. Its molecular structure and composition were measured by single crystal diffraction, elemental analysis and thermogravimetry. Each Ce³⁺ was nine coordinated with the coordination geometry of three⁃capped triangular prism. The central Ce³⁺ could be bridged by the carboxylate and sulfonate groups of the L^3- ligands, forming a two⁃dimensional layered structure. The interlayers were connected by the hydrogen bonds between the coordination water molecules and oxygen atoms of functional groups, increasing the stability of the structure. The fluorescence measurement results show that compound 1 exhibits the characteristic fluorescence emission peak of the ligand at 427 nm. It also has the second⁃order nonlinear optical property, and its intensity is 0.7 times of that of potassium dihydrogen phosphate (KDP).

Solar⁃powered water evaporation as a solar⁃powered photothermal conversion application has attracted people's attention due to its high solar energy conversion efficiency and the industrial potential of clean water production. In recent years, solar⁃powered evaporation systems, which position energy conversion between solar energy and thermal energy at the air/liquid interface, have been proposed as an alternative to conventional volumetric heating evaporation because they can reduce heat loss and increase energy conversion efficiency. In this review, we discussed how to implement high⁃performance evaporation system design strategies, including porous nanostructures, interfacial evaporation structures, and wicking structures, as well as three systems that described solar⁃driven water evaporation, namely volume systems, interface systems, and Isolation system. This paper described the possibility of applying this solar⁃driven interface evaporation process to desalination and wastewater treatment, and discussed some of the problems and challenges.

he biomass conversion to small molecule by gasification through pyrolysis is an important driving force to realize the replacement of fossil energy with bioenergy. Gasification through microwave⁃assisted pyrolysis is a common route for conversion of biomass to desired bioenergy and bioproducts. The review describes the technology of microwave enhanced pyrolysis and microwave⁃assisted catalytic gasification. In addition, this review discusses both the challenges and opportunities of biomass pyrolysis using microwave heating and the milestones that are necessary to be obtained in the future

2⁃tert⁃butyl⁃p⁃cresol (2⁃TBC) was synthesized by alkylation of p⁃cresol with tert⁃butanol under microwave irradiation using HY with different n(Si)/n(Al) as catalyst. The effects of microwave irradiation time and power, reaction temperature, molar ratio of raw materials and kinds of solvents on the reaction were investigated using xylene as solvent. The results show that the conversion of p⁃cresol is increased about three times when HY zeolite with 5.4 n(Si)/n(Al) as catalyst, the molar ratio of raw material is n(tert⁃butanol)/n(p⁃cresol)=1.3, the microwave radiation power is 700 W, the microwave radiation heating time is only 1/8 of the oil bath heating time, the highest conversion of p⁃cresol was 72.91%; the yield of target product 2⁃TBC was 68.08%, and the selectivity was 93.32%; by⁃products are etherification product p⁃toluene tert⁃butyl ether (TBPE) and dialkylation product 2,6⁃di⁃tert⁃butyl p⁃cresol (2,6⁃DTBC)

In this paper, layered titanic acid H1.07Ti1.73O4•H2O (HTO) was treated with hydrogen peroxide solution to achieve the hydrogen peroxide intercalation and modification of HTO. The hydrogen peroxide molecules entered into the interlayer of TiO6 octahedral layer, forming a peroxytitanium coordination bond with Ti4+ in the layer, which increased the negative charge density of the TiO6 layers. XRD, SEM, TEM, XRF, FT⁃IR and other methods were used to characterize the samples before and after ion exchange. The ion exchange experiments show that compared with HTO, the ion exchange efficiency and ion exchange capacity of H2O2⁃modified HTO are greatly enhanced. And the main reason is that the introduction of H2O2 leads to the increase of negative charge of TiO6 octahedral layers.

The geometrical structure of the 1,2,3⁃triazole compounds was optimized by B3LYP/6⁃31G* in density functional theory (DFT), and the obtained structure was confirmed to be the optimal structure by frequency calculation. Based on the optimized configuration, the frontier orbital energy levels and energy gaps of compounds were analyzed. The charge of ADCH in the molecule was calculated, and the theoretical absorption spectra, fluorescence emission wavelengths and IR spectra of these compounds were simulated. Through the analysis of the hydrogen bond interaction with HIV⁃1 protease, it is concluded that this series of derivatives is expected to be used as an imaging anti⁃protein inhibitor. In addition, the reaction mechanism between β⁃lactam carbene and 3,6⁃dipyrazine⁃1,2,4,5⁃tetrazine was studied, and the synthesis mechanism was further clarified, which provided a theoretical basis for the future synthesis of the series of compounds. This provides a theoretical basis for the synthesis of this series of compounds in the future.

In this work, the cubic/hexagonal cadmium sulfide (c/h⁃CdS) heterojunction catalyst was successfully prepared by solid phase reaction with cadmium acetate and thioacetamide as raw materials.The synthesized catalysts were characterized by means of XRD, SEM and SPV. The activity of photocatalytic degradation of rhodamine B (RhB) was evaluated by using visible light as the light source. The effect of calcination temperature on the photocatalytic performance of CdS was investigated, and the mechanism of the degradation process was discussed. The results suggest that with the increasing of calcination temperature, c⁃CdS is gradually changing to h⁃CdS. The c/h⁃CdS phase junction formed in the phase transition shows a higher photocatalytic activity than the pure c⁃CdS and h⁃CdS, and the appropriate six⁃square phase content is more beneficial to improve the photocatalytic performance of the heterogenous sample. The results of surface photovoltage show that the formation of heterojunction can significantly improve the photoelectron⁃hole separation efficiency, thus promoting the photocatalytic performance of c/h⁃CdS phase junction. In the experiment of the sacrificial agent, the active species in the CdS photocatalytic reaction is ·O2-.

Synthetic technology of anthraquinone (AQ) and its derivatives in the past ten years was reviewed. The process conditions of anthraquinone production from anthracene (AN) by oxidation and phthalic anhydride were described in detail. The mechanism of anthraquinone oxidation by anthracene oxidation was analyzed. The application of one⁃step and two⁃step synthesis of ruthenium catalyst from phthalic anhydride was introduced. Especially, the application and development of zeolites and strong acidic ionic liquids as catalysts was introduced in the anthraquinone synthesis process by one⁃step or two⁃step, and have suggestions for the development of future antimony synthesis processes.

A bis Schiff base ligands was synthesized using 2-hydroxy benzaldehyde and ethylenediamine. With schlenk technique and nitrogen protecting conditions, anhydrous cobalt chloride was reacted with the ligands in a 1∶1 molar ratio to form a mononuclear cobalt (II) Schiff base complex used for electrically driven catalytic water oxidation. After purified, the complex was characterized using nuclear magnetic resonance, infrared spectroscopy and high resolution mass spectrometry. And the electrochemical performance of the catalytic oxidation of water was investigated by cyclic voltammetry using electrochemical workstation. The result indicated that the catalyst has an active electrically driven water oxidation catalytic activity under the condition of neutral pH, and the initial oxygen release potential of the oxidation peak is only 0.5 V. The multiple consecutive scan results of the CVs showed that there was no new redox reaction in the process of water oxidation.Therefore the catalytic system was with good stability. Combined with the low synthesis cost and the difficulty of synthesis and purification, the complex is considered to have good research value and application prospect in the field of catalytic water oxidation.

Water-driven oil in porous media fluid and solid coupled heat transfer control equations was established by the theory of percolation mechanics and the sandstone reservoir was porous medium. Different well pattern was established for the same reservoir numerical simulation, qualitative analysis of the process of oil pressure, the remaining oil distribution, and the various concentration range the proportion of oil, quantitative analysis of the volume fraction of the sum of the remaining oil and various oil recovery year. The results show that 5 to 9 years of oil remaining oil distribution changed in the inert area, during this time recovery changed smoothly; Analysis of a variety of oil recovery wells arrangement size was that five-spot well pattern was larger than nine-pot well pattern, and nine-spot well pattern was larger than Line shape well pattern. When the water intensity constant, from the perspective of recovery. For this reservoir five-spot well pattern was the best well pattern.

A l PW1 2O4 0 was prepared by phosphotungstic acid and Al(NO3)3•9H2O and used as catalyst to catalyze the condensation of benzaldehyde with 1,2propylene glycol using cyclohexane as water trapping reagent. The reaction condition including catalyst pretreatment temperature, amount of cyclohexane, molar ratio of starting materials, reaction time, dosage of catalyst and oil bath temperature were investigated. The results show that A l PW1 2O4 0 is a good catalyst for the condensation of benzaldehyde with 1, 2propylene glycol. The optimal reaction condition were as followed：n (alcohol)∶n(aldehyde)=2.0∶1, catalyst pretreatment at 150 ℃, 0.7 g of catalyst, 7 mL of cyclohexane and 2.6% total mass of starting material at 130 ℃ for 3 h. The conversion of benzaldehyde can reach up to 98.83% under optimal condition.

A series of novel Brnsted acidic organic perrhenates were applied as catalysts for sulfide oxidations using 30% H2O2 as oxidant. The structures and thermal stability data of the catalysts were characterized by FT-IR, NMR and TGA. Meanwhile, the effect of various solvents, the dosage of H2O2 and catalyst, temperature and the reaction time on the catalytic performance was studied in details. The results indicate that the selectivity and yield of sulfoxide can reach up to 95% under the optimal conditions, in which the dosage of catalyst is 0.03 mol, the dosage of H2O2 is 2.4 mmol, 40 ℃ and 90 min.

It is reported herein a novel debenzoylation of diaryl ketones. The effect of the additives, catalysts, and temperature were studied carefully. The results indicate that the yield of this transformation can reach up to 72% under the standard conditions∶ n(ptoluenesulfonic acid)∶n (starting material)=1∶100, n(ethylene glycol)∶n(starting material) =3∶1, toluene, 80 h under reflux. This reaction provides a new method for the debenzoylation of diaryl ketones.

Starch was reacted with polyethylene terephthalate polyethylene glycol (PET-PEG) copolymer using hexamethylenediisocyanate as a coupling agent in order to prepare new PET-PEG/ST copolymers. The obtained PET-PEG/ST was characterized by FTIR and 1HNMR spectroscopy, thermal analysis, and the water absorption and biodegradable tests. The results show that starch was attached to PET-PEG via couple reaction in the presence of hexamethylenediisocyanate. As compared to PETPEG, PET-PEG/ST has avariable thermal stability with decreasing melting temperature. PET-PEG/ST has degraded in aqueous solution with different pH under different levels, and the degradation rate of PET-PEG/ST in aqueous solution under different pH values from big to small order as follows: alkaline solution,acidic solution,neutral solution. PET-PEG/ST also tends to degrade in biologically active environments like amylase.

The research of shutdown temperature drop rule in heated oil pipeline was the primary condition to ensure the safe restarts of the pipeline. According to the characteristics of service environments of submarine oil pipeline, based on the theory of porous media heat transfer, the submarine soil moistureheat coupling equation was established. Regularity of change of oil temperature was simulated in submarine pipeline during shutdown with time by software．The factors of effecting，such as thermal insulation layer, temperature of seepage flow and speed of seepage flow and so on，were analyzed，which decided a rational time for shutdown and provided a theoretical guidance for safe submarine oil pipeline startup．

Aiming at the leakage and diffusion problems of the 35 MPa ultrahigh pressure gas pipeline in densely populated area, the FLUENT software in the threedimensional numerical simulation was used under different climate conditions in the deep buried gas pipeline leak case. And the axial and surface safety area of the hydrogen sulfide and methane was provided when the ultrahigh pressure gas pipeline had leaked under the conditions of different wind speeds. Because of the buoyancy, the natural gas developed in the upward form during the process of diffusion. The wind speed and pressure had different effects on the diffusion process under the different environments. The result was that as the wind speed and pressure was higher, the natural gas was spread to the farther distance. This increased the lowest explosive limit and alerted the concentration range of the natural gas. The research result could provide the effective basis to the stuffs and security management in leakage spot.

In the processing of downhole accidents especially reservoir head accident, the fish head was not in the middle of the hole, and even attached to the variation of well radius was big. Therefore it was very difficult to implement common fishing method. On the site flexible elbow joints and bending drill pipes were generally to use to look for the fish. It would bend drill pipes many times, then cause waste and even safety accidents. According to this situation, the adjustableangle bend drill pipe was designed. It consisted of top connection, spline body, adjustable sleeve and lowercontact and so on. By adjusting spline body and adjustable sleeve, 0°～4°angle adjustment could be finished. The model machine of the adjustableangle bend drill pipe had been manufactured and applied to many oil wells. The results showed that it was available that the adjustableangle bend drill pipe was applied to fish the fishing head, which was easy to adjust the pipe on wellhead. The application was successful and 300 thousands could be saved per well.

Because of Most of the oil fields have come into the high water content exploitation period, and the water injection rate increased rapidly. So to improve and meliorate the efficiency of oil field surface water injection system has become one of the important tasks in the oil field water production process. It is necessary to study the distribution rules of oil and water's movement in the oil extraction process of oil deposit. Twodimensional numerical simulation to water injection of oil extraction was maole and the regularities of distribution of water and oil was analyzed in the flat surface boundary during the process of oil extraction. This result of the study shows that at the simulation of flat surface boundary from exploitation to flow field, the distribution of the shape of water stability in the oil deposit passed through round, irregular ellipse, and topped with three oil wells like an irregular patterning. Oil distribution of the shape in the oil deposit was the range of total simulation minus water. Although stress can improve the range of oil's flushing out, the effect would be reduced by times of pressure strengthen. There is a constant cabin altitude state which is similar to a triangle and topped with three oil wells in simulation range, and this field keeps the same after the whole simulation process is stable. 

The variation rules of strength, load and reliability of mechanical components were studied with the change of time, and a model for dynamic reliability of mechanical components was established under the random load acting. According to the model, the design of dynamic reliability sensitivity was discussed as well as the approach to calculate dynamic reliability sensitivity was proposed, meanwhile, combining the theory of reliability-based optimization design with the method of sensitivity analysis, the computation model of dynamic reliability-based robust optimization design was established, then the problem of dynamic reliability-based robust optimization design of mechanical components is solved.