Formation of fluorescent supramolecular polymeric assemblies via orthogonal pillar[5]arene-based molecular recognition and metal ion coordination

2015 ◽  
Vol 51 (21) ◽  
pp. 4503-4506 ◽  
Author(s):  
Bingbing Shi ◽  
Kecheng Jie ◽  
Yujuan Zhou ◽  
Danyu Xia ◽  
Yong Yao
Keyword(s):  
Molecular Recognition ◽  
Metal Ion ◽  
Zinc Ion ◽  
Supramolecular Polymer ◽  
Polymeric Assemblies

A fluorescent supramolecular polymer was efficiently constructed by pillar[5]arene-based host–guest molecular recognition and zinc ion coordination.

Novel rare earth fluorescent supramolecular polymeric assemblies constructed by orthogonal pillar[5]arene-based molecular recognition, Eu(iii)-coordination and π–π donor–acceptor interactions

2017 ◽  
Vol 53 (5) ◽  
pp. 889-892 ◽  
Author(s):  
Liqing Shangguan ◽  
Hao Xing ◽  
Julfikar Hassan Mondal ◽  
Bingbing Shi
Keyword(s):  
Rare Earth ◽  
Molecular Recognition ◽  
Molecular Interaction ◽  
Supramolecular Polymer ◽  
Donor Acceptor ◽  
Polymeric Assemblies

Linear rare earth fluorescent supramolecular polymer is easily constructed by pillar[5]arene-based molecular interaction.

Reversible formation of supramolecular polymer networks via orthogonal pillar[10]arene-based host–guest interactions and metal ion coordinations

2015 ◽  
Vol 44 (47) ◽  
pp. 20334-20337 ◽  
Author(s):  
Lintao Wu ◽  
Chun Han ◽  
Xi Wu ◽  
Lei Wang ◽  
Yaozi Caochen ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Metal Ion ◽  
Polymer Networks ◽  
Supramolecular Polymer ◽  
Reversible Formation

Reversible supramolecular polymer networks were constructed by orthogonal pillar[10]arene-based host–guest molecular recognition, terpyridine–Zn2+, and carbene–Ag+ coordinations.

1.85 Å Resolution Structure of the ZincII β-Lactamase from Bacillus cereus

1998 ◽  
Vol 54 (3) ◽  
pp. 313-323 ◽  
Author(s):  
Andrea Carfi ◽  
Emile Duée ◽  
Moreno Galleni ◽  
Jean-Marie Frère ◽  
Otto Dideberg
Keyword(s):  
Bacillus Cereus ◽  
Active Site ◽  
Metal Ion ◽  
Wide Spectrum ◽  
Zinc Ion ◽  
Beta Lactamases ◽  
Carbonate Ion ◽  
Class B ◽  
Bivalent Metal Ions ◽  
Using Data

Class B \beta-lactamases are wide spectrum enzymes which require bivalent metal ions for activity. The structure of the class B zinc-ion-dependent β-lactamase from Bacillus cereus (BCII) has been refined at 1.85 Å resolution using data collected on cryocooled crystals (100 K). The enzyme from B. cereus has a molecular mass of 24 946 Da and is folded into a \beta-sandwich structure with helices on the external faces. The active site is located in a groove running between the two \beta-sheets [Carfi et al. (1995). EMBO J. 14, 4914–4921]. The 100 K high-resolution BCII structure shows one fully and one partially occupied zinc site. The zinc ion in the fully occupied site (the catalytic zinc) is coordinated by three histidines and one water molecule. The second zinc ion is at 3.7 Å from the first one and is coordinated by one histidine, one cysteine, one aspartate and one unknown molecule (which is most likely to be a carbonate ion). In the B. cereus zinc \beta-lactamase the affinity for the second metal ion is low at the pH of crystallization (Kd = 25 mM, 293 K; [Baldwin et al. (1978). Biochem. J. 175, 441–447] and the dissociation constant of the second zinc ion thus apparently decreased at the cryogenic temperature. In addition, the structure of the apo enzyme was determined at 2.5 Å resolution. The removal of the zinc ion by chelating agents causes small changes in the active-site environment.

scholarly journals Removal of Zinc ions from industrial wastewater with wool fibers

2010 ◽  
Vol 7 (3) ◽  
pp. 1193-1201
Author(s):  
Baghdad Science Journal
Keyword(s):  
Acid Concentration ◽  
Contact Time ◽  
Industrial Wastewater ◽  
Metal Ion ◽  
Low Cost ◽  
Zinc Ion ◽  
Ion Concentration ◽  
Natural Material ◽  
Zinc Ions ◽  
Wool Fibers

In this research, the efficiency of low-cost unmodified wool fibers were used to remove zinc ion from industrial wastewater. Removal of zinc ion was achieved at 99.52% by using simple wool column. The experiment was carried out under varying conditions of (2h) contact time, metal ion concentration (50mg/l), wool fibers quantity to treated water (70g/l), pH(7) & acid concentration (0.05M). The aim of this method is to use a high sensitive, available & cheep natural material which applied successfully for industrial wastewater& synthetic water, where zinc ion concentration was reduced from (14.6mg/l) to (0.07mg/l) & consequently the hazardous effect of contamination was minimized.

ChemInform Abstract: Molecular Recognition and Metal Ion Template Synthesis

ChemInform ◽  
1989 ◽  
Vol 20 (41) ◽  
Author(s):  
T. J. MCMURRY ◽  
K. N. RAYMOND ◽  
P. H. SMITH
Keyword(s):  
Molecular Recognition ◽  
Template Synthesis ◽  
Metal Ion

A self-healing supramolecular polymer gel with stimuli-responsiveness constructed by crown ether based molecular recognition

2013 ◽  
Vol 4 (11) ◽  
pp. 3312 ◽  
Author(s):  
Xuzhou Yan ◽  
Donghua Xu ◽  
Jianzhuang Chen ◽  
Mingming Zhang ◽  
Bingjie Hu ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Crown Ether ◽  
Supramolecular Polymer ◽  
Self Healing ◽  
Polymer Gel
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