Heat capacity of anhydrous 4, 4′-bipyridine was measured by adiabatic calorimetry between 10 and 300K. Thermodynamic functions are tabulated.

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Phase equilibria were studied in the Sr-Ca-Cu-O system by annealing samples at 1153K in Ar-O₂ gas mixtures. The stability ranges of the oxide solid solutions were observed by X-ray diffraction measurements especially at 4 compositions in 12 gas mixtures. 4 sets of invariant 4-phase equilibrium and their oxygen partial pressure, P_O2, were deduced from the surrounding 3-phase equilibria. The compositions of the related phases were evaluated by combining EDX analysis and the sample compositions. These results are compared with equilibrium calculations based on thermodynamic modelling.

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燃焼熱測定の実験値に基づき,C₆₀やコラヌレンなどの非平面共役系の共鳴エネルギーや歪エネルギーの定量的評価を行った。まず参照分子としての平面共役系のエネルギー論を定式化し,ついで非平面sp²炭素ネットワークヘと拡張した。グラファイト片,フラーレン,フラーレンオニオンの生成エンタルピーをこのエネルギー論に基づき構成炭素数の関数として予測した。

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Researches on hydration/dehydration calorimetry of zeolites and on zeolite heat pump systems have been reviewed. Hydration heat of zeolites can be used for heat exchange in a heat pump system without any fuels or electricity. Reversible heat exchange or heat storage of the zeolite/water system have been tested extensively so as to use zeolites as heat exchange absorbents and water as an absorbate. The simple but physicochemically unique combination of zeolite and water of the system is attractive for environmental safety, and for effective use of low temperature heat sources such as solar energy and waste heat from factories. However, hydration mechanisms of zeolitic water are so complicated that some confusions are found even in basic researches which are thus necessary to explore optimum zeolites suitable for the heat pump system.

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BEDT-TTFラジカル塩の相転移機構について,構造解析・物性測定により検討した。(BEDT-TTF)₃(ClO₄)₂では対アニオンの回転運動が171Kにおけるこの塩の金属-絶縁体二次相転移に重要な役割を果たしている。対イオン間の水素結合によりアニオンの回転を抑制した同型物質の(BEDT-TTF)₃(HSO₄)₂では構造相転移が抑えられ,126KでMott型の一次相転移が生じる。溶媒分子を含む系である(BEDT-TTF)₂X・TCE_0.5(X=ClO₄,BF₄;TCE=1,1,2-トリクロロエタン)では,25K(ClO₄塩)もしくは60K(BF₄塩)において相転移が発現するか否かは150～200Kの領域の冷却速度に依存するが,これは超格子構造が発達する温度でもある。BF₄塩について低温構造解析を行ったところ,ドナー分子末端のジヒドロジチイン環の配座の乱れの部分的秩序化が見出された。

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