인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
We report an efficient approach for the synthesis of medicinally important dihydropyrano[2,3-<i>c</i>]pyrazoles derivatives by using Fe<sub>3</sub>O<sub>4</sub>@BTC nanocomposite (NCs) based catalytic system. The Fe<sub>3</sub>O<sub>4</sub>@BTC NCs were successfully synthesised <i>via</i>. immobilizing benzene-1,3,5-tricarboxylic acid (BTC) on Fe<sub>3</sub>O<sub>4</sub> magnetic nanoparticles (MNPs). The synthesised NCs were characterized using X-ray diffraction (XRD) which disclose the formation of a crystalline structure of Fe<sub>3</sub>O<sub>4</sub>@BTC NCs, Fourier transform infrared (FTIR) spectroscopy suggests the presence of Fe-O band at 576 cm<sup>-1</sup> in addition to -C[double bond, length as m-dash]O, -O-H stretching frequencies are also observed, field emission scanning electron microscopy (FE-SEM) represents the spherical shape of Fe<sub>3</sub>O<sub>4</sub>@BTC NCs, high resolution-transmission electron microscopy (HR-TEM) revealed the particle size tobe ∼10.335 nm, energy dispersive analysis of X-ray (EDAX) shows the presence of Fe, C and O elements, Brunauer-Emmett-Teller (BET) surface area reveals its specific surface area 84.87 m<sup>2</sup> g<sup>-1</sup> and thermogravimetric analysis (TGA) shows its exceptional higher thermal stability. Furthermore, all dihydropyrano[2,3-<i>c</i>]pyrazoles derivatives were synthesised with high yield (79-92%), in shorter time (4-12 min). Recyclability of NCs was also investigated and it was found that the NCs can be reused over five cycles without any significant loss in its activity. Significantly, this protocol has prominent benefits such as high yields of product, shorter reaction time, facile workup, recyclable, use of ultrasound as clean energy source and absence of toxic solvents.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.