A New Two-Armed Colorimetric Chemosensor for Fluoride

2005 ◽  
Vol 58 (1) ◽  
pp. 53 ◽  
Author(s):  
Jin-Long Wu ◽  
Yong-Bing He ◽  
Lan-Hua Wei ◽  
Ling-Zhi Meng ◽  
Ting-Xian Yang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
1H Nmr Spectroscopy ◽  
Colour Change ◽  
High Yield ◽  
Anion Receptor ◽  
Binding Properties ◽  
Easy Method ◽  
Colorimetric Chemosensor ◽  
Hydrogen Bonding Interactions ◽  
Multiple Hydrogen Bonding

The neutral anion receptor 1 was synthesized by an easy method with high yield. The binding properties of anions with 1 were examined by UV-vis and 1H NMR spectroscopy. Receptor 1 can form a 1 : 2 complex with F−, and 1 : 1 complexes with AcO− and H2PO4− anions, respectively, by multiple hydrogen-bonding interactions. There is an observable colour change for the complex formed by 1 and F−.

A sandwich anion receptor by a BODIPY dye bearing two calix[4]pyrrole units

2011 ◽  
Vol 65 (4) ◽  
Author(s):  
Yongjun Lv ◽  
Jian Xu ◽  
Yong Guo ◽  
Shijun Shao
Keyword(s):  
Hydrogen Bonding ◽  
Fluorescence Quenching ◽  
Absorption Spectra ◽  
Emission Peak ◽  
Red Shift ◽  
Absorption Peak ◽  
Anion Receptor ◽  
Sandwich Complex ◽  
Hydrogen Bonding Interactions ◽  
Multiple Hydrogen Bonding

AbstractA novel dicalix[4]pyrrolyl-substituted 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) dye I with an absorption peak at approximately 670 nm and an emission peak at about 690 nm was prepared. As an anion receptor, I displayed a red shift in absorption spectra and fluorescence quenching in varying degrees in the presence of F−, AcO−, H2PO4−, or Cl−. Compared with the parent calix[4]pyrrole, a representative anion receptor, I exhibited a stronger affinity to these anions due to the formation of a sandwich complex through multiple hydrogen-bonding interactions.

Exclusive Recognition of Acetone in a Luminescent BioMOF through Multiple Hydrogen-Bonding Interactions

2019 ◽  
Vol 58 (12) ◽  
pp. 7667-7671 ◽  
Author(s):  
Yong-Liang Huang ◽  
Pei-Li Qiu ◽  
Jian-Ping Bai ◽  
Dong Luo ◽  
Weigang Lu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonding Interactions ◽  
Multiple Hydrogen Bonding

Novel ferrocene-based bifunctional amine–thioureas for asymmetric Michael addition of acetylacetone to nitroolefins

2015 ◽  
Vol 13 (17) ◽  
pp. 5054-5060 ◽  
Author(s):  
Xiaochen Ren ◽  
Chunyan He ◽  
Yingle Feng ◽  
Yonghai Chai ◽  
Wei Yao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Efficient Method ◽  
Michael Addition ◽  
High Yield ◽  
Bifunctional Catalysts ◽  
Michael Adducts ◽  
Asymmetric Michael Addition ◽  
Multiple Hydrogen Bonding

An efficient method was developed to synthesize the ferrocene-based bifunctional amine–thioureas bearing multiple hydrogen-bonding donors. Asymmetric Michael addition of acetylacetone to nitroolefins catalyzed by these novel bifunctional catalysts affords the Michael adducts in high yield and moderate to excellent enantioselectivities.

A new hydrazone-based colorimetric chemosensor for naked-eye detection of copper ion in aqueous medium

2019 ◽  
Vol 43 (9-10) ◽  
pp. 426-430
Author(s):  
Shao-Min Shi ◽  
Qiao Li ◽  
Sheng-Li Hu
Keyword(s):  
Metal Ions ◽  
Copper Ion ◽  
Colour Change ◽  
Selective Recognition ◽  
X Ray Diffraction ◽  
Binding Properties ◽  
X Ray ◽  
Naked Eye ◽  
Colorimetric Chemosensor ◽  
Naked Eye Detection

A new hydrazone-based colorimetric Cu2+ chemosensor is synthesized. Its structure was confirmed by single-crystal X-ray diffraction. Its binding properties towards various metal ions are examined through absorption spectroscopy. In aqueous THF solution, the chemosensor exhibits selective recognition towards Cu2+ over other metal ions with a colour change from colourless to pink. The complex formed between the chemosensor and Cu2+ ions forms a 2:1 stoichiometry with an association constant of 2.46 × 108M−2. The analytical detection limit for Cu2+ by the naked eye is as low as 10.0 μM.

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