Sa Liu

Synthesis of Adamantane-Based Trimeric Cationic Surfactants

Abstract GRAPHICAL ABSTRACT

Synthesis and Characterizaion of Adamantane-Containing Quaternary Ammonium Salts

To develop the potential use of adamantane derivatives in surfactant field, the adamantyl residue was introduced into the quaternary ammonium salt. The method involved synthesizing N-(1-adamantyl)-N, N-dimethylamine from 1-adamantine and quaternizing with different alkylating agents. Eight adamantane-containing quaternary ammonium salts were prepared and their structures were identified by 1H NMR and IR.

A Novel Synthesis of 3-Amino-1-Adamantanemethanol

3-amino-1-adamantanemethanol was synthesized from adamantane carboxylic acid following the procedures of Ritter reaction, hydrolysis, neutralization and reduced reaction without the participation of bromine. The total yield of 3-amino-1-adamantanemethanol was 43%. The structure of the target compound was characterized by elemental analysis, IR, MS, 1HNMR,etc. In addition, the possible reaction mechanisms was proposed.

SYNTHESIS AND CHARACTERIZATION OF BIODEGRADABLE COPOLYMERS AS NON-PHOSPHOROUS DETERGENT BUILDERS: SYNTHESIS AND CHARACTERIZATION OF BIODEGRADABLE COPOLYMERS AS NON-PHOSPHOROUS DETERGENT BUILDERS

合成了一种环状乙烯酮缩二醇化合物2-亚甲基-l,3-二氧环庚烷(MDO)单体,并通过与部分中和的丙烯酸(AA)进行自由基开环聚合,合成了主链上含有酯基、侧链上含有羧基的新型可生物降解共聚物P(AA-co-MDO),用傅里叶变换红外(FTIR),核磁共振(1H-NMR)和多角度激光光散射(MALLS)对共聚物的组成与分子量进行了表征,结果表明,共聚物结构明确.同时,通过差示扫描量热法(DSC)和热重分析法(TGA)测定了共聚物的热性能,结果显示,P(AA-co-MDO)有明显的玻璃化转变温度(Tg).研究发现,随着MDO投料量的增加,热稳定性有所下降,但仍维持在较高的水平,完全可以满足洗涤剂的生产工艺要求.X-射线衍射(XRD)测定结果显示,P(AA-co-MDO)为无定型聚合物,有利于生物降解,并通过共聚物在活性污泥的降解实验表明,其降解率随体系中MDO含量的增加而升高.另外,对共聚物的助洗性能进行了测定,并与其他助洗剂进行了对比,结果表明,其螯合能力强、分散力高、pH缓冲值高,是一种性能优良的洗涤助剂.

Synthesis of Al-Containing Mesoporous Molecular Sieves and their Catalytic Performance to Isomerization Reaction of Endo-Tetrahydrodicyclo-Pentadiene

Al-containing mesoporous molecular sieves(Al-MCM-41) were synthesized at ambient temperature. The structures of samples were characterized by XRD, N2-adsorption/desorption isotherms and FT-IR, etc. The evaluation results showed that Al-MCM-41 had higher catalytic activity for isomerization conversion of endo-tetrahydrodicyclo-pentadiene (endo-TCD) into exo-tetrahydrodicyclo-pentadiene (exo-TCD) and adamantane (AdH). Loading inorganic acid on the surface of Al-MCM-41 led increase of its catalytic activity and the yield of adamantane.

The First Synthesis of N,N,N’,N’-Tetramethyl-1, 3-Disaminomethyl- Adamantane Dihydrochloride

A new tertiary amine derivative of adamantane —N,N,N’,N’-tetramethyl-1, 3-disaminomethyl adamantane dihydrochloride (1), which is a key intermediate for preparing Gemini surfactants and bola surfactants, has been synthesized in this paper. The target compound (1) can be synthesized in high yield by using 1-adamantanecarboxylic acid as raw material. The structure of these compounds has been identified.