The intimate host-anion interactions will regulate thermodynamics and kinetics in the self-assembly of cationic cages mimicking biological counterparts.Herein,we report construction and transformation of three Pd(Ⅱ)-...The intimate host-anion interactions will regulate thermodynamics and kinetics in the self-assembly of cationic cages mimicking biological counterparts.Herein,we report construction and transformation of three Pd(Ⅱ)-based metal-organic cages(MOCs)depending on different anions.Stoichiometric conversions of the lantern-shaped MOC-34 into either octahedral MOC-35 or tricapped trigonal prism MOC-36 are induced by BF_(4)^(–)or NO_(3)^(–),respectively.MOC-36 is kinetically favored and can undergo quantitative conversion to the thermodynamically preferred MOC-35 upon heating,accelerated by excess BF_(4)^(–)to motivate dissociative dynamics of Pd-vertices and lower activation barrier of cage transformation.The guest encapsulation behaviors of MOC-35 and MOC-36 have also been tested.These results manifest a significance of host-anion dynamics beyond complementary anion template,shedding light on the understanding of intricate anion recognition in nature.展开更多
A novel anion receptor2 bearing anthracene flurophore and thiourea was synthesized and identified by1H NMR, MS, IR and elemental analysis. The interaction between receptor2 and various α, ω-dicarboxylate anions was ...A novel anion receptor2 bearing anthracene flurophore and thiourea was synthesized and identified by1H NMR, MS, IR and elemental analysis. The interaction between receptor2 and various α, ω-dicarboxylate anions was studied by fluorescence spectrum. The obtained fluorescence data indicate that 1∶1 stoichiometry complex is formed between receptor2 with diferent dicarboxylate anions through a hydrogen-bonging interaction. The selectivity of2 for recognition of different dicarboxylates deponds on chain length of the anionic species. Key words anion receptor - fluorescence - synthesis - anion recognition CLC number O 626 Foundation item: Supported by the National Science Foundation of china (20372054)Biography: WANG Fa-jun (1976-), male, Master Candidate, research direction: supramolecular chemistry.展开更多
基金supported by the NKRD Program of China(No.2021YFA1500401)the National Natural Science Foundation of China(Nos.21821003,21890380)the LIRTP of Guangdong Pearl River Talents Program(No.2017BT01C161)。
文摘The intimate host-anion interactions will regulate thermodynamics and kinetics in the self-assembly of cationic cages mimicking biological counterparts.Herein,we report construction and transformation of three Pd(Ⅱ)-based metal-organic cages(MOCs)depending on different anions.Stoichiometric conversions of the lantern-shaped MOC-34 into either octahedral MOC-35 or tricapped trigonal prism MOC-36 are induced by BF_(4)^(–)or NO_(3)^(–),respectively.MOC-36 is kinetically favored and can undergo quantitative conversion to the thermodynamically preferred MOC-35 upon heating,accelerated by excess BF_(4)^(–)to motivate dissociative dynamics of Pd-vertices and lower activation barrier of cage transformation.The guest encapsulation behaviors of MOC-35 and MOC-36 have also been tested.These results manifest a significance of host-anion dynamics beyond complementary anion template,shedding light on the understanding of intricate anion recognition in nature.
文摘A novel anion receptor2 bearing anthracene flurophore and thiourea was synthesized and identified by1H NMR, MS, IR and elemental analysis. The interaction between receptor2 and various α, ω-dicarboxylate anions was studied by fluorescence spectrum. The obtained fluorescence data indicate that 1∶1 stoichiometry complex is formed between receptor2 with diferent dicarboxylate anions through a hydrogen-bonging interaction. The selectivity of2 for recognition of different dicarboxylates deponds on chain length of the anionic species. Key words anion receptor - fluorescence - synthesis - anion recognition CLC number O 626 Foundation item: Supported by the National Science Foundation of china (20372054)Biography: WANG Fa-jun (1976-), male, Master Candidate, research direction: supramolecular chemistry.
