新型3-吲哚-四取代氧化吲哚的无催化剂合成

以3-氯氧化吲哚为原料,在无催化剂条件下发生S_N1反应,合成了18个新型的3-吲哚-四取代氧化吲哚,产率34%~77%,其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。     

3-卤氧化吲哚参与胺基化反应合成3-胺基四取代氧化吲哚

以3-卤氧化吲哚为起始原料，DMAP为有机催化剂，在甲苯中于60 ℃和苄胺发生3-胺基化取代反应后，用Boc基团对氮原子进行保护，合成了7个新型的N-Boc-3-胺基四取代氧化吲哚，收率85%~93%，其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。     

新型3-烷氧基-四取代氧化吲哚的无催化剂无溶剂合成

以3-氯氧化吲哚和甲醇（或甘油）为原料，在无催化剂无溶剂条件下经S_N1反应合成了10个新型的3-甲氧基-四取代氧化吲哚(产率36%~93%)和10个新型的3-甘油拼接四取代氧化吲哚（产率71%~87%）,其结构经¹H NMR, C N¹³MR和HR-MS（ESI-TOF）表征。     

新型甘油拼接3-四取代氧化吲哚的无催化剂无溶剂合成

以3-氯氧化吲哚为原料，在无催化剂、无溶剂条件下于80 ℃发生亲核取代反应，合成了10个新型的甘油拼接3-四取代氧化吲哚，收率54%~72%， dr值10/9~>10/7, 其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。     

新型3-哌啶/吡咯烷氧化吲哚的合成

以3-卤氧化吲哚、哌啶或吡咯烷为起始原料,碳酸钠为催化剂,于65 ℃经3-叔胺基化反应,合成了15个新型的3-哌啶/吡咯烷氧化吲哚,收率84%~93%,其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。     

新型3-吗啉-3-四取代氧化吲哚的合成

以3-卤氧化吲哚和吗啉（或硫代吗啉）为起始原料，碳酸钠为催化剂，于60 ℃发生3-叔胺基化反应，合成了10个新型的3-吗啉四取代氧化吲哚 (3aa~3bh)，收率86%~94%，其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。     

新型异噁唑拼接3,3'-吡咯螺环双氧化吲哚类化合物的无催化剂合成

以3-异硫氰氧化吲哚与硝基异噁唑缩合的3-烯氧化吲哚,在二氯甲烷中无催化剂条件下于室温发生Michael加成环化反应,获得了8个未见文献报道的异噁唑拼接3,3′ 吡咯螺环双氧化吲哚类化合物（3a~3h）,产率91%~95%,dr值5/3~3/1,其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。     

新型5-取代吲哚-3-甲酰胺化合物的合成

以5-取代吲哚为原料,经维尔斯迈尔-哈克反应制得5-取代吲哚-3-甲醛(2a~2e); 2a~2e在DMF催化下,与盐酸羟胺反应制得5-取代吲哚-3-甲腈（3a~3e）; 3a~3e在H₂O₂和NaOH溶液中水解合成了5-取代吲哚-3-甲酰胺（4a~4e, 4b~4e为新化合物）,产率62.0%~75.0%,其结构经¹H NMR, ¹³C NMR和ESI-MS表征。     

区域选择性Michael/Aldol串联反应合成新型1′-茚醇拼接3-氧化吲哚类化合物

以3-烯烃氧化吲哚为起始原料,甲苯为溶剂,与丙二腈或腈基乙酸乙酯发生区域选择性Michael/Aldol串联反应,合成了6个新型的1′-茚醇拼接3-氧化吲哚类化合物,收率73%~90%, dr高达10/1,其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。     

连续双季碳螺环氧化吲哚拼接异噁唑类化合物的合成

以硝基异噁唑-3-烯氧化吲哚1作为基于给体和受体的3C合成子,与叔丁基酯-3-烯氧化吲哚2,在碱性催化剂DABCO催化下发生Michael加成环化反应,获得10个新颖的连续双季碳螺环氧化吲哚拼接异噁唑类化合物3a~3j,产率为57%~70%, dr值为4/1~9/1, 其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征,并且经过单晶3f进一步确定了其结构。      

Synthesis of some derivatives of 3-amino-3-desoxyerythrose and 3-amino-3-desoxy-D-3-erythrose

The synthesis of derivatives of 3-amino-3-deoxy-L-erythrose by LAH or LAD reduction of the oxime of 1,2-O-isopropylidene α-L -glycero-tetros-3-ulofuranose is described.     

Synthesis of γγγ-trifluorocarbonyl compounds

γγγ-Trifluorocarbonyl compounds are easily obtained in a good yield by introduction of the 1,1,1-trifluoroethyl moiety (CF₃-CH₂-) on the -methylene group of a ketone.     

Freezing the polarization of CH3NH3PbI3 and CH3NH3PbI3-xClx perovskite films

Thin films of methylammonium lead halides, CH₃NH₃PbI₃ and CH₃NH₃PbI_3-xCl_x, were deposited onto symmetrical microstructured electrode arrays of gold or platinum on Si/SiO₂ wafers. Polarization studies were carried out on perovskite films under vacuum in the dark. For poling, a constant voltage was applied to the samples while the temperature was cycled between 295 K and 4 K. The measured current densities depending on the temperature showed distinct characteristics relating strongly to the crystal phase and the dielectric properties of the perovskite films. Voltage sweeps were carried out at different scan rates at specific temperature intervals after poling. The polarization of the films due to the migration of iodide vacancies in direction of the blocking perovskite/metal interface was frozen almost up to room temperature. Charge carriers were only able to cross the blocking barrier and contribute to the current where the ions have accumulated during poling. All J-V curves showed hysteresis: inverted and regular hysteresis at room temperature and below, respectively. Inverted hysteresis originates from the slow accumulation of ions at the blocking barrier, while regular hysteresis arises from a distortion in the adjacent crystals which will be discussed.     

钙钛矿CH3NH3PbI3晶体的电化学

电化学方波伏安及循环伏安测量表明,钙钛矿CH₃NH₃PbI₃晶体在有机电解质中的氧化还原过程伴随着化学降解。该化学降解源于CH₃NH₃PbI₃晶体中铅离子的还原以及碘离子的氧化。通过电化学伏安法可以测定晶体的能带。     

Non-Isothermal Kinetics of the Decomposition Reaction of Cluster [Ag3WS3Br]（PPh3）3 and [Cu3WS3Br]（PPh3）3

The thermal behaviors of clusters [Ag3WS3Br](PPh3)3 and [Cu3WS3Br](PPh3)3 (PPh3=triphenyl phosphine) in a nitrogen atmosphere were studied under the non-isothermal conditions by simultaneous TG-DTG-DSC and EDS techniques. The results showed that the evolution of PPh3 generally proceeded before the release of the other moiety in one or two step-mode. The mechanisms, the kinetic and the thermodynamic parameters for decomposition of PPh3 of both clusters were determined and calculated by jointly using several methods, which showed that its evolution was controlled by Avrami-Erofeev equation. The results also showed that there was no new stable phase composed of W-Ag(Cu)-S-Br after release of organic moiety PPh3 and that CVD method was not applicable to their further processing.     

Synthesis of 3-functionalized 3-methylazetidines

1-t-Butyl- and 1-(4-methylbenzyl)-3-bromo-3-methylazetidines were prepared from the corresponding N-(2,3-dibromo-2-methylpropylidene)alkylamines and their propensity to undergo nucleophilic substitution at the 3-position by different nucleophiles was assessed, providing a convenient access to novel 3-alkoxy-, 3-aryloxy-, 3-hydroxy-, 3-cyano-, 3-carboxy-, 3-(aminomethyl)- and 3-(hydroxymethyl)azetidines.