Minich Iana A, Silyukov Oleg I, Gak Veronika V, Borisov Evgeny V, Zvereva Irina A
Institute of Chemistry, St. Petersburg State University, 198504 St. Petersburg, Russia.
Center for Optical and Laser Materials Research, St. Petersburg State University, 198504 St. Petersburg, Russia.
ACS Omega. 2020 Mar 30;5(14):8158-8168. doi: 10.1021/acsomega.0c00424. eCollection 2020 Apr 14.
New organic-inorganic hybrids have been synthesized by the intercalation of -alkylamines (methylamine, ethylamine, -propylamine, -butylamine, -hexylamine, and -octylamine) into the structure of the protonated and hydrated form of the perovskite-like layered titanate HKBiTiO·HO (HKBT·HO). The possibility of the synthesis of the hybrid materials was studied in a wide range of conditions. It was found that interlayer water plays a crucial role in the formation of intercalated hybrids. The obtained compounds were characterized with powder X-ray diffraction analysis; Raman, IR, and NMR spectroscopies; thermogravimetry (TG), TG coupled with mass spectrometry, and CHN analyses; and scanning electron microscopy. It was suggested that the intercalated -alkylamines exist in the form of alkylammonium ions forming a paraffin-like bilayer with an average tilting angle of ∼77.5°. The obtained HKBT×RNH compounds contain 0.4-0.7 -alkylamine molecules per formula unit as well as the varied amount of intercalated water. By gentle heating, they can be obtained as dehydrated forms, which are thermally stable up to 250 °C.
通过将 - 烷基胺（甲胺、乙胺、 - 丙胺、 - 丁胺、 - 己胺和 - 辛胺）插入类钙钛矿层状钛酸盐HKBiTiO·HO（HKBT·HO）的质子化和水合形式的结构中，合成了新型有机 - 无机杂化物。在广泛的条件下研究了合成杂化材料的可能性。发现层间水在插层杂化物的形成中起关键作用。通过粉末X射线衍射分析、拉曼光谱、红外光谱和核磁共振光谱、热重分析（TG）、TG与质谱联用以及CHN分析和扫描电子显微镜对所得化合物进行了表征。有人提出，插层的 - 烷基胺以烷基铵离子的形式存在，形成平均倾斜角约为77.5°的石蜡状双层。所得的HKBT×RNH化合物每个化学式单元含有0.4 - 0.7个 - 烷基胺分子以及不同量的插层水。通过温和加热，可以得到脱水形式，其在高达250°C的温度下热稳定。
