TY - JOUR
T1 - Fabrication of ultrathin 2D MOF nanosheets for folic acid detection
AU - LI, Jing
AU - CHEN, Shu Li
AU - YAN, Rui Peng
AU - Young, David James
AU - MI, Yan
AU - HU, Fei Long
N1 - Funding Information:
The authors thank the financial supports from the National Natural Science Foundation of China (Grant Nos. 21961004 and 52002089 ) and the China Postdoctoral Science Foundation (Grant No. 2020M670525 ), Xiangsi Lake Young Scholars of Guangxi Minzu University (No. 2021RSCXSHQN04 , 2020RSCXSHQN06 ) and the training program for thousands of backbone young teachers in Guangxi universities.
Publisher Copyright:
© 2023
PY - 2023/6
Y1 - 2023/6
N2 - Metal organic frameworks (MOFs) {[Zn2(L1)2(SDB)2]·H2O}n (MOF1), [Zn2(L2)(SDB)2]n (MOF2) and [Zn2(L3)(hfipbb)2]n (MOF3) (L1 = 4,4′-(2,5-dimethyl-1,4-phenylene)bis(ethene-2,1-diyl))dipyridine), L2 = (E,E,E)-1,6-bis(4-pyridyl)-l,3,5-hexatriene, L3 = 4,4′-((2-methyl-1,4-phenylene)bis(ethene-2,1-diyl))bipyridine, H2SDB = 4,4′-sulfonyldibenzoic acid, H2hfipbb = 2,2-bis(4-carboxyphenyl) hexafluoropropane) were prepared by hydrothermal synthesis. Weak van der Waals forces were observed between 2D layers in MOF1 and MOF2. The weak interlayer interactions could be cleaved by external mechanical force and bulk samples were exfoliated into single-layer two-dimensional nanosheets by ultrasound in ethanol. Single-layer MOF nanosheets which had a lateral size of approximately 2 µm were generated after ultrasound treatment of MOF1 and MOF2. However, 3D coordination network of MOF3 could not be successfully exfoliated because of its different network structure. MOF1 and MOF2 nanosheets dispersed in ethanol displayed strong photoluminescence (PL), which could be quenched specifically by folic acid (FA) through a concentration dependent manner. This hypersensitive and fast luminescence sensing benefited from numerous active sites and broad specific surface area of these ultrathin nanosheets.
AB - Metal organic frameworks (MOFs) {[Zn2(L1)2(SDB)2]·H2O}n (MOF1), [Zn2(L2)(SDB)2]n (MOF2) and [Zn2(L3)(hfipbb)2]n (MOF3) (L1 = 4,4′-(2,5-dimethyl-1,4-phenylene)bis(ethene-2,1-diyl))dipyridine), L2 = (E,E,E)-1,6-bis(4-pyridyl)-l,3,5-hexatriene, L3 = 4,4′-((2-methyl-1,4-phenylene)bis(ethene-2,1-diyl))bipyridine, H2SDB = 4,4′-sulfonyldibenzoic acid, H2hfipbb = 2,2-bis(4-carboxyphenyl) hexafluoropropane) were prepared by hydrothermal synthesis. Weak van der Waals forces were observed between 2D layers in MOF1 and MOF2. The weak interlayer interactions could be cleaved by external mechanical force and bulk samples were exfoliated into single-layer two-dimensional nanosheets by ultrasound in ethanol. Single-layer MOF nanosheets which had a lateral size of approximately 2 µm were generated after ultrasound treatment of MOF1 and MOF2. However, 3D coordination network of MOF3 could not be successfully exfoliated because of its different network structure. MOF1 and MOF2 nanosheets dispersed in ethanol displayed strong photoluminescence (PL), which could be quenched specifically by folic acid (FA) through a concentration dependent manner. This hypersensitive and fast luminescence sensing benefited from numerous active sites and broad specific surface area of these ultrathin nanosheets.
KW - 2D MOF
KW - Folic Acid detection
KW - Luminescent sensing
KW - Test paper
KW - Ultrathin MOF nanosheet
UR - http://www.scopus.com/inward/record.url?scp=85150363203&partnerID=8YFLogxK
U2 - 10.1016/j.cjac.2023.100251
DO - 10.1016/j.cjac.2023.100251
M3 - Article
AN - SCOPUS:85150363203
SN - 0253-3820
VL - 51
SP - 1
EP - 8
JO - Chinese Journal of Analytical Chemistry
JF - Chinese Journal of Analytical Chemistry
IS - 6
M1 - 100251
ER -