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Study on photochromic perfluorocyclopetene containing six-numbered unit as optical recording materials Haibo Wang, Congbin Fan and Gang Liu* Jiangxi Key Lab of Organic Chemistry Jiangxi Science & Technology Normal University, Nanchang, China liugang0926@163.com Keywords: Photochromic materials; photochromism; structure; optical recording Abstract.
A reversible molecule switching of symmetrical photochromic diarylethene 1,2-bis methyl phenyl perfluorocyclopentene has been synthesized and its photochromic and simulated molecule structure were also investigated.
Results and discussion A) DFT investigation of the molecule structure We have investigated the structure in gaseous using quantum chemical calculations with density functional theory (DFT) in b3lyp/6-31g lever.
The optimized structure shows in Fig. 1.

This research investigated the Fe doping effects on the Strontium Titanate (SrTiO3) structure to improve its photocatalytic activity.
It is a ferroelectric material having a cubic ABO3 perovskite crystal structure [3].
It indicates that Fe doping has been successfully conducted in the SrTiO3 crystal structure because it does not alter the original structure.
Journal of Industrial and Engineering Chemistry, 97(2021), 111-128 [2] D.
Contribution of the Department of Chemistry of Clark University, 78(1956), 1338-1343 [14] SH Wang and PR Griffiths.Resolution enhancement of diffuse reflectance ir spectra of coals by fourier self-deconvolution.

The surface of κ-Al2O3/TiCN coating exhibited hexagon grain structure.
The κ-Al2O3 layer showed columnar structure while the TiCN layer exhibited fibrous structure with long-needle grains.
The grains of surface exhibit dense packing structure.
In Fig. 2 (a), the intermediate TiCN layer has fibrous structure with long needle-like grains while the k-Al2O3 layer shows no-columnar structure.
In Fig. 2 (b) and Fig. 2 (c), k-Al2O3 layers exhibit the columnar structure.

Poly[N-(9-fluorenylmethoxycarbonyl)-L-phenylalanine] with Good Solubility and Good Blue Light-emitting properties via Electropolymerization Cunyuan Lai1, Wenjuan Guo1, *, Xinde Tang2, *, Guangyou Zhang1, Qiwei Pan1 and Meishan Pei1 1School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China 2Institute of New Materials, Shandong Jiaotong University, Jinan 250023, China guowj66@gmail.com *, xdtang8033@163.com * correspondence author Keywords: Chirality, Poly[N-(9-fluorenylmethoxycarbonyl)-L-phenylalanine], Good solubility, Blue-light emitter Abstract Poly[N-(9-fluorenylmethoxycarbonyl)-L-phenylalanine] (PN9FPA) films with good fluorescence properties and good solubility were prepared electrochemically by direct anodic oxidation of N-(9-fluorenylmethoxycarbonyl)-L-phenylalanine (N9FPA) in boron trifluoride diethyletherate (BFEE).
The structures of the monomer and the polymers were characterized and evaluated with IR.
The molecular structure of N9FPA is shown in Scheme 1.

Marine vessels and offshore structures are constantly exposed to these corrosive conditions. 3.
Materials Chemistry and Physics, 101(1), (2007).
McCafferty, Surface chemistry of aqueous corrosion processes (p. 96).
Aslam, An overview of the corrosion chemistry. 
Marine Structures, 71, (2020) pp.102718

The crystal structure parameters were then obtained through Rietveld analysis.
The peaks shift observed in the spectrum can be attributed to the diversity of the crystalline structures of each component.
New Journal of Chemistry 46 (2022), 5489-5504
The Journal of Physical Chemistry C 2012, 116 (48), 25602-25610
Altomare et al., « Automatic structure determination from powder data with EXPO2004 », J.

Near-equiatomic NiTi alloy exhibits martensitic transformation from B2 to B19’ structure and is the most excellent shape memory material.
We reported an anomalous change of electronic structure in the parent phase (B2) before transforming into martensitic phase (B19’) for Ni51Ti49 alloy studied by positron lifetime measurement in the previous paper [6].
However, the origin of anomalous electronic-structure change in NiTi alloys has not been clarified yet.
In order to study electronic-structure change in NiTi alloy which causes anomalous change in positron lifetime, PAL spectra and electrical resistivity were measured simultaneously on identical specimen. 2D-ACAR was also measured on Ni52Ti48 single crystal, which does not transform from B2 to B19’.
Shirai: Advances in Quantum Chemistry 42 (2003), 109.

At the microlevel, the coating has a martensitic structure.
The fine structure of the coating was analyzed by SEM and TEM.
The coating structure retained the contours of dendritic structure, and perhaps, the boundaries of the former β-phase grains.
At the micro level, the coating has a structure of martensite.
Karen Alves de Souza, Alain Robin: Materials Chemistry and Physics 103 (2007) pр{TTP}1088 . 351–360 [3].

Their morphologies, structures, surface properties and magnetism were characterized by Field emission scanning electron microscopy (FE-SEM) images, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and Vibrating sample magnetometer (VSM), respectively.
Their morphologies, structure, surface properties and magnetism were characterized by FE-SEM, XRD, FTIR, and VSM.
Structure.
Fig. 4 Hysteresis loops of the CoFe2O4 nanoparticles between –1500 Oe and +1500 Oe Summary We have synthesized the CoFe2O4 nanoparticle samples using a solution method in the presence of EG and HMTA at 85 °C for 6 h and characterized their morphologies, structures, surface properties and magnetism by FE-SEM, XRD, FTIR, and VSM, respectively.
Co: Progress in Chemistry Vol. 21 (2009), p. 880 [2] P.

Preparation and properties of silane-terminated poly(urethane-imide) Xiaoxi Hu a, Yun Wang b College of Chemistry & Chemical Engineering, Qinzhou University, Qinzhou, Guangxi, P.
The structure of the products was characterized by FT-IR.
Containing repeating urethane linkage and having alternating hard and soft segments, PU exhibit a typical two-phase micro structure and have found wide applications in medical devices due to their good mechanical properties and biocompatibility[3].
The most accepted approach for improving the thermal stability of PU is the chemical modification in structure by introducing thermally stable aromatic polymers like polyimides .
Measurements A Fourier transform infrared(FTIR) spectrometer (Spectrum One, Perkin-Elmer, USA) was used to identify the structure.