The Study of Intercalation Field through Positron Injection and the Synthesis, Structures and Properties of Intercalation Compounds

1.合成的2，3-二氯-9，10-蒽醌经区熔高度纯化后，用Bridgman法生长成分子平面几乎平行取向的单晶。正电子被注入一个14 x 8 x 6 mm^3大小的晶体中，晶体中含有约7.4中心的x 10^5 Bq ^NaCl，在与晶体中的电子湮灭时发射511 keV的伽马射线。<22>发现正电子衰减为310 ps的单寿命分量，且沿着γ//a方向的多普勒展宽宽度比沿沿着γ//b或c方向的多普勒展宽宽度窄，表明电子自由运动的区域沿分子C轴沿着较宽.<2v>2.研究了四硫富瓦烯和吡啶嵌入MnPS_3单晶的电子结构，发现四硫富瓦烯处于TTF ^+和TTF^0的混合价态，吡啶与中性吡啶分子形成氢键PyH ^+-Py复合物。吡啶物种垂直于P_2S_6层取向。<4->3.利用热钨丝上产生的活泼氢原子与CsC_8反应，可制得CsC_8与氢的三元插层化合物。RbC_8、KC_8和CsC_8对氢气的吸杂速率依次较大，而对氧气的吸杂速率均在10 μ s~（-1）量级。<-1><-1>石墨-溴层间化合物在0.3、0.8和1.2GPa压力下发生压致相变，并伴随着溴键合轴相对于石墨层的倾斜度变化。4.真空升华的C_和C_，用5%苯的己烷溶液在氧化铝上柱层析分离，正电子-电子湮没寿命分别为427和403 ps，而C_I_给出两个寿命谱分量。<60><70><60><0.08>

1. Synthesized 2,3-dichloro-9,10-anthraquinone, highly purified by zone-melting, was grown by the Bridgman method to a single crystal in which the molecular planes were oriented nearly in parallel. Positrons injected into a crystal, 14 x 8 x 6 mm^3 in size, which contained ca. 7.4 x 10^5 Bq^<22>NaCl at the center, emitted 511 keV gammaray upon annihilation with electrons in the crystal. Positrons were found to decay with a single lifetime component of 310 ps and the Doppler-broadening width along gamma// a was narrower than that along gamma// b or c, which demonstrated that the region where electrons moved freely was wider along the molecular C_<2v> axis. 2. The electronic structures of tetrathiafulvalene and pyridine intercalated into MnPS_3 single crystals were studied : the former was found to be in the mixed-valence state between TTF^+ and TTF^0, and the latter to form hydrogen-bonded PyH^+-Py complexes solvated with neutral pyridine molecules. The pyridine species were oriented perpendicularly to P_2S_6^<4-> layers. 3. A ternary intercalation compound of CsC_8 with hydrogen could be prepared by the reaction between CsC_8 and active hydrogen atoms generated on a hot tungsten filament. Gettering rates of RbC_8, KC_8 and CsC_8 for hydrogen gas were found to be large in this sequence, while those for oxygen were all in the order of 10^<-1>s^<-1>. A graphite-bromine intercalation compound in a diamond anvil cell showed pressure-induced phase transitions at 0.3, 0.8 and 1.2 GPa, which were found to be accompanied with inclination-changes of bromine-bonding axis against graphite layers. 4. Vaccum-sublimed C_<60> and C_<70>, isolated by column chromatography with 5% benzene in hexane on alumina, gave the positron-electron annihilation lifetimes of 427 and 403 ps, respectively, while C_<60>I_<0.08> gave two components for the lifetime spectrum.