Nickel(II) based homo- vs heterometallic 1D coordination polymers derived from a novel 6-aminouracil building block: Structures, topologies, non-covalent interactions, magnetism, and antibacterial activity

2018 ◽  
Vol 482 ◽  
pp. 384-394 ◽  
Author(s):  
Atanu Purkayastha ◽  
Diptanu Debnath ◽  
Moumita Majumder ◽  
Joaquín Ortega-Castro ◽  
Alexander M. Kirillov ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Coordination Polymers ◽  
Building Block ◽  
Non Covalent Interactions ◽  
Block Structures ◽  
Covalent Interactions

Halide ion-driven self-assembly of Zn(ii) compounds derived from an asymmetrical hydrazone building block: a combined experimental and theoretical study

2016 ◽  
Vol 40 (12) ◽  
pp. 10116-10126 ◽  
Author(s):  
Ghodrat Mahmoudi ◽  
Farhad Akbari Afkhami ◽  
Himanshu Sekhar Jena ◽  
Parisa Nematollahi ◽  
Mehdi D. Esrafili ◽  
...  
Keyword(s):  
Self Assembly ◽  
Building Block ◽  
Theoretical Study ◽  
Counter Ion ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Self-assembly of Zn(ii) compounds is influenced by a counter ion and non-covalent interactions.

scholarly journals Reorganization of Self-Assembled DNA-Based Polymers Using Orthogonally Addressable Building Blocks

2021 ◽  
Author(s):  
Serena Gentile ◽  
Erica Del Grosso ◽  
Leonard J. Prins ◽  
Francesco Ricci
Keyword(s):  
Self Assembly ◽  
Rational Design ◽  
Building Blocks ◽  
Binding Domain ◽  
Non Covalent Interactions ◽  
Sticky Ends ◽  
Self Assembled ◽  
Block Structures ◽  
Covalent Interactions

Taking advantage of the addressability and programmability of DNA/DNA non-covalent interactions we report here the rational design of orthogonal DNA-based addressable tiles that self-assemble into polymer-like structures that can be reconfigured and reorganized by external inputs. The different tiles share the same 5-nucleotide sticky ends responsible for self-assembly but are rationally designed to contain a specific regulator-binding domain that can be orthogonally targeted by different DNA regulator strands (activators and inhibitors). We show that by sequentially adding specific activators and inhibitors it is possible to re-organize in a dynamic and reversible way the formed polymer-like structures to display well-defined distributions: homopolymers made of a single tile, random polymers in which different tiles are distributed randomly and block structures in which the tiles are organized in segments.

High strength and antibacterial polyelectrolyte complex CS/HS hydrogel films for wound healing

Soft Matter ◽  
2019 ◽  
Vol 15 (38) ◽  
pp. 7686-7694 ◽  
Author(s):  
Mengmeng Shu ◽  
Shijun Long ◽  
Yiwan Huang ◽  
Dapeng Li ◽  
Haiyan Li ◽  
...  
Keyword(s):  
Wound Healing ◽  
Antibacterial Activity ◽  
Polyelectrolyte Complex ◽  
High Strength ◽  
E Coli ◽  
High Antibacterial Activity ◽  
Non Covalent Interactions ◽  
Covalent Interactions ◽  
Hydrogel Films

Hydrogels with high strength were obtained based on non-covalent interactions. High antibacterial activity against E. coli was archived, and wound healing was remarkably facilitated through complexation of two functional polysaccharides.

scholarly journals Self-assembly of 5,6-dihydroxyindole-2-carboxylic acid: polymorphism of a eumelanin building block on Au(111)

Nanoscale ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 5422-5428 ◽  
Author(s):  
F. De Marchi ◽  
G. Galeotti ◽  
M. Simenas ◽  
P. Ji ◽  
L. Chi ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Self Assembly ◽  
Building Block ◽  
Non Covalent Interactions ◽  
Catechol Oxidation ◽  
Covalent Interactions

Non-covalent interactions allow DHICA to self-assemble into multiple phases that can be transformed by O2 exposure due to catechol oxidation.

Synthesis of unsymmetrical porphyrin triad containing three different porphyrin subunits assembled by covalent and non-covalent interactions

2008 ◽  
Vol 12 (09) ◽  
pp. 1030-1040 ◽  
Author(s):  
Sokkalingam Punidha ◽  
Smita Rai ◽  
Mangalampalli Ravikanth
Keyword(s):  
Building Block ◽  
Functional Group ◽  
Photophysical Properties ◽  
Time Resolved Fluorescence ◽  
Efficient Energy Transfer ◽  
Time Resolved ◽  
Fluorescence Studies ◽  
Efficient Energy ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Cis-21,23-dithiaporphyrin building block containing one iodophenyl and one pyridyl functional group at meso positions was synthesized by condensing unsymmetrical thiophene diol and symmetrical 16-thiatripyrrin under refluxing propionic acid conditions. The 21,23-dithiaporphyrin building block was coupled with mono-functionalized 21-thiaporphyrin building block containing meso-phenylethyne functional group under mild Pd (0) coupling conditions. The steady-state and time-resolved fluorescence studies support an efficient energy transfer in the singlet excited state from N 3 S porphyrin subunit to N 2 S 2 porphyrin subunit in the dyad. The N 3 S - N 2 S 2 porphyrin dyad was then treated with RuTPP ( CO )( EtOH ) in toluene at refluxing temperature and purified by column chromatography to afford a porphyrin triad containing N 3 S , N 2 S 2 and RuN 4 porphyrin subunits assembled using both covalent and non-covalent interactions. The photophysical properties showed the fluorescence quenching of N 3 S and N 2 S 2 porphyrin subunits in triad due to heavy ruthenium ion which was coordinated to meso-pyridyl ' N ' of N 2 S 2 porphyrin subunit of porphyrin triad.

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