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The microencapsulated myristic acid with titanium dioxide (TiO2) shell as shape-stabilized thermal energy storage materials was prepared using sol–gel method. The XRD and FT-IR techniques results presented that characteristic peaks of both myristic acid and TiO2 can be observed in the microencapsulated myristic acid with TiO2 shells. The phase change temperature, latent heat and thermal stability were investigated by a differential scanning calorimetry (DSC) and thermogravimetric analyzer (TGA). According to these results, the melting and freezing temperatures of the MPCM/TiO2 shell and MPCM/TiO2 shell–fly ash are 56.95 and 52.22 °C; 47.56 and 26.68 °C and the latent heats of melting and freezing are 96.64 kJ kg−1; 97.72 and 23.43 kJ kg−1; and 22.57 kJ kg−1, respectively. TGA results certified that the addition of fly ash improved thermal stability. In particular, MPCM/TiO2 shell displays good thermal reliability after 1000 repeated melting/freezing cycling.

This study focuses on the preparation of camphene/palmitic acid mixture as novel phase change material for the first step of composite-based phase change materials. Camphene–palmitic acid-based composite phase change materials (PCMs) for thermal energy storage were prepared by vacuum impregnation method. The maximum incorporation percentage for camphene–palmitic into pyroclastic, fly ash, barite and marble powder were found to be 33.09, 55.5, 31.5 and 35.96 %, respectively. The differential scanning calorimetry analysis revealed that the composite PCMs were suitable applicants for building applications in terms of their appropriate phase change temperatures and extensive latent heat values. The SEM results showed that the homogeneity of the samples is good, and according to supporting materials porosity formation is observed. Thermal cycling test indicated that the form-stable composite PCMs have good thermal reliability and chemical stability although they were subjected to 2,000 melting/freezing cycling.

Inthisstudy,aseriesofshape-stabilizedphase-changematerials(PCMs)of camphene/stearicacid(CS)werepreparedandtheirthermalpropertiesweremeasured by differential scanning calorimetry. The results indicated that the mixture consisting of 60mass% camphene and 40mass% stearic acid is the most favorable as a PCM, in termsofthephase-changetemperatureandlatentheat.Thereafter,theCSwasabsorbed in fly ash, pyroclastic, barite, and marble powder, which acts as a supporting material, to prepare four kinds of composite-based PCMs. DSC, FT-IR, and scanning electron microscopy measurements were made to investigate the structures and properties of the PCMs. DSC results showed that the latent heats of melting and freezing of the composite PCMs were sharply decreased. Morphology and structural characterization revealed that, in form-stable PCMs, the dispersion of the supporting materials in the camphene/stearic acid matrix is homogeneous and there is no chemical interaction between the CS and composites. The composite PCMs showed excellent thermal stabilities and reliabilities, when their phase-change temperatures were concerned. Theseindicatethatthepreparedcomposite-basedPCMsaresuitableforthermalenergy

ATAOL, Cigdem YUKSEKTEPE/0000-0001-6098-0328; WOS: 000243191000161 In the title compound, C19H20N4S2 center dot 2H(2)O, the two 1H-benzimidazole groups are bridged by a propane chain; the dihedral angle between the benzimidazole ring systems is 74.61 ( 3)degrees. The organic molecules and solvent water molecules form O - H center dot center dot center dot N hydrogen bonds. There are also O - H center dot center dot center dot O, C - H center dot center dot center dot S, C - H center dot center dot center dot pi and pi - pi interactions in the crystal structure.

ATAOL, Cigdem YUKSEKTEPE/0000-0001-6098-0328 WOS: 000284774700014 The titled compound (1), has been synthesized and characterized by IR and (1)H-NMR spectroscopy, and single crystal X-ray diffraction. The compound crystallizes in the triclinic space group P-1. The crystal structure is stabilized by C-HaEuro broken vertical bar pi and aromatic pi-pi interactions. There are also intramolecular N-HaEuro broken vertical bar N and C-HaEuro broken vertical bar N hydrogen bonds in the molecule. The use of quantum chemical calculations to characterise and optimise the choice of material is illustrated by ab initio treatments. Vibrational frequencies and LUMO-HOMO energy difference of 1 have also been investigated by Density functional theory (DFT) and Hartree-Fock (HF) calculations. Calculated frequencies are in good agreement with the corresponding experimental data. Faculty of Arts and Sciences, Ondokuz Mayis University, TurkeyOndokuz Mayis University [F.279]; The Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [105T419] The authors wish to acknowledge the Faculty of Arts and Sciences, Ondokuz Mayis University, Turkey, for the use of the STOE IPDS-II diffractometer (purchased under grant F.279 of the University Research Fund). We are indebted to the The Scientific and Technological Research Council of Turkey (TUBITAK, project No. 105T419) for financial support of this work.

The title compound, C(18)H(14)Cl(2)N(2)O(2)S, was synthesized by the reaction of 1,4,5,6-tetrahydropyrimidine-2-thiol and 2-chlorobenzoyl chloride. The dihedral angle between the two chlorobenzene rings is 76.2 (1)degrees. The ring carbon ( and attached H atoms) opposite the C S group are disordered over two sites. In the crystal structure, there is one intermolecular C - H(...)O and one intramolecular C - H(...)N hydrogen bond.