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Ionic liquid induced highly dense assembly of porphyrin in MOF nanosheets for photodynamic therapy
Dalton Transactions ( IF 3.5 ) Pub Date : 2020-11-17 , DOI: 10.1039/d0dt03031g
Jian-Hua Qin 1 , Hua Zhang , Pengfei Sun , Ya-Dan Huang , Qingming Shen , Xiao-Gang Yang , Lu-Fang Ma
Affiliation  

Two-dimensional (2D) metal–organic framework (MOF) nanosheets have emerged as a new member of 2D nanomaterials for molecular sieving, energy conversion and storage, catalysis and biomedicine. In this paper, a highly dense assembly of porphyrin achievable in porphyrin-integrated MOF nanosheets induced by an ionic liquid is obtained by sonication exfoliation of its bulk crystals. The 2D layered structure MOF, [BMI]2[Ca3(H2TCPP)22-OH2)2(H2O)2] (1), was firstly prepared by using the ionic liquid assisted synthetic method (H6TCPP = meso-tetra(carboxyphenyl) porphyrin, BMI = 1-butyl-3-methylimidazolium). The laminated layers in 1 clearly indicate a weak interlayer non-covalent interaction but a strong metal–carboxylate bonding within the layers, which facilitates the exfoliation of 1 to form 2D MOF nanosheets (1 NSs). Powder X-ray diffraction (PXRD), high-resolution transmission electron microscopy (HR-TEM) and fast Fourier transform (FFT) patterns revealed that 1 NSs could maintain their crystalline structure after exfoliation. These MOF nanosheets exhibited excellent aqueous dispersibility, biodegradability and high cytotoxicity under light irradiation against MCF-7 cells.

中文翻译:

离子液体诱导 MOF 纳米片中卟啉的高密度组装用于光动力治疗

二维 (2D) 金属有机骨架 (MOF) 纳米片已成为用于分子筛分、能量转换和存储、催化和生物医学的二维纳米材料的新成员。在本文中,通过对其块状晶体进行超声剥离,获得了在离子液体诱导的卟啉集成 MOF 纳米片中可实现的高密度卟啉组装。二维层状结构MOF,[BMI] 2 [Ca 3 (H 2 TCPP) 22 -OH 2 ) 2 (H 2 O) 2 ] ( 1 ),首先采用离子液体辅助合成方法制备( H 6 TCPP = 中-四(羧基苯基)卟啉,BMI = 1-丁基-3-甲基咪唑鎓)。在叠层1清楚地表明一个弱的层间非共价相互作用,但在层内的强的金属-羧酸根成键,这有利于的剥离1,以形成2D MOF纳米片(1奈米)。粉末 X 射线衍射 (PXRD)、高分辨率透射电子显微镜 (HR-TEM) 和快速傅立叶变换 (FFT) 图案表明,1 NSs在剥离后可以保持其晶体结构。这些 MOF 纳米片在光照射下对 MCF-7 细胞表现出优异的水分散性、生物降解性和高细胞毒性。
更新日期:2020-11-27
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