Controlled chiral supramolecular assemblies of water soluble achiral porphyrins induced by chiral counterions

2016 ◽  
Vol 52 (67) ◽  
pp. 10253-10256 ◽  
Author(s):  
Anushri Rananaware ◽  
Duong Duc La ◽  
Mohammad Al Kobaisi ◽  
Rajesh S. Bhosale ◽  
Sidhanath V. Bhosale ◽  
...  
Keyword(s):  
Supramolecular Assembly ◽  
Supramolecular Assemblies ◽  
Water Soluble

A controlled handed chiral supramolecular assembly of achiral porphyrins induced by chirald- andl-arginine (Arg) in water.

Novel water soluble cationic Au(I) complexes with cyclic PNNP ligand as building blocks for heterometallic supramolecular assemblies with anionic hexarhenium cluster units

2018 ◽  
Vol 196 ◽  
pp. 485-491 ◽  
Author(s):  
Julia Elistratova ◽  
Igor Strelnik ◽  
Konstantin Brylev ◽  
Michael A. Shestopalov ◽  
Tatiana Gerasimova ◽  
...  
Keyword(s):  
Building Blocks ◽  
Supramolecular Assemblies ◽  
Water Soluble

scholarly journals Star-shaped tetrathiafulvalene oligomers towards the construction of conducting supramolecular assembly

2015 ◽  
Vol 11 ◽  
pp. 1596-1613 ◽  
Author(s):  
Masahiko Iyoda ◽  
Masashi Hasegawa
Keyword(s):  
Mixed Valence ◽  
Supramolecular Assembly ◽  
Radical Cations ◽  
Supramolecular Assemblies ◽  
Supramolecular Structures ◽  
Oxidation States ◽  
Face To Face ◽  
Redox Active ◽  
Nanophase Separation ◽  
Self Organizing

The construction of redox-active supramolecular assemblies based on star-shaped and radially expanded tetrathiafulvalene (TTF) oligomers with divergent and extended conjugation is summarized. Star-shaped TTF oligomers easily self-aggregate with a nanophase separation to produce supramolecular structures, and their TTF units stack face-to-face to form columnar structures using the fastener effect. Based on redox-active self-organizing supramolecular structures, conducting nanoobjects are constructed by doping of TTF oligomers with oxidants after the formation of such nanostructures. Although radical cations derived from TTF oligomers strongly interact in solution to produce a mixed-valence dimer and π-dimer, it seems to be difficult to produce nanoobjects of radical cations different from those of neutral TTF oligomers. In some cases, however, radical cations form nanostructured fibers and rods by controlling the supramolecular assembly, oxidation states, and counter anions employed.

scholarly journals Cancer-mitochondria-targeted photodynamic therapy with supramolecular assembly of HA and a water soluble NIR cyanine dye

2017 ◽  
Vol 8 (12) ◽  
pp. 8351-8356 ◽  
Author(s):  
Ajesh P. Thomas ◽  
L. Palanikumar ◽  
M. T. Jeena ◽  
Kibeom Kim ◽  
Ja-Hyoung Ryu
Keyword(s):  
Photodynamic Therapy ◽  
Supramolecular Assembly ◽  
Water Soluble ◽  
Cyanine Dye ◽  
Targeted Photodynamic Therapy

Herein, we introduce an indocyanine derivative (IR-Pyr) that is highly water soluble, exhibiting higher mitochondrial targetability and better photostability than IR-780.

Strong circularly polarized luminescence induced from chiral supramolecular assembly of helical nanorods

2017 ◽  
Vol 53 (54) ◽  
pp. 7505-7508 ◽  
Author(s):  
Yuxiang Wang ◽  
Xiaojing Li ◽  
Fei Li ◽  
Wei-Yin Sun ◽  
Chengjian Zhu ◽  
...  
Keyword(s):  
Supramolecular Assembly ◽  
Supramolecular Assemblies ◽  
Stacking Interactions ◽  
Circularly Polarized ◽  
Π Stacking ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Chiral supramolecular assemblies (BNS–BPP) can exhibit circularly polarized luminescence (CPL) via electrostatic and π–π stacking interactions.

scholarly journals Cryo-EM structure and kinetics reveal electron transfer by 2D diffusion of cytochrome c in the yeast III-IV respiratory supercomplex

2020 ◽  
Author(s):  
Agnes Moe ◽  
Justin Di Trani ◽  
John L. Rubinstein ◽  
Peter Brzezinski
Keyword(s):  
Electron Transfer ◽  
Respiratory Chain ◽  
Supramolecular Assembly ◽  
Kinetic Studies ◽  
Water Soluble ◽  
Complex Iii ◽  
Surface Patch ◽  
Cellular Respiration ◽  
Oxidoreductase Activity ◽  
Membrane Bound

AbstractEnergy conversion in aerobic organisms involves an electron current from low-potential donors, such as NADH and succinate, to dioxygen through the membrane-bound respiratory chain. Electron transfer is coupled to transmembrane proton transport that maintains the electrochemical proton gradient used to produce ATP and drive other cellular processes. Electrons are transferred between respiratory complexes III and IV (CIII and CIV) by water-soluble cyt. c. In S. cerevisiae and some other organisms, these complexes assemble into larger CIII2CIV1/2 supercomplexes, the functional significance of which has remained enigmatic. In this work, we measured the kinetics of the S. cerevisiae supercomplex’s cyt.c-mediated QH2:O2 oxidoreductase activity under various conditions. The data indicate that the electronic link between CIII and CIV is confined to the surface of the supercomplex. Cryo-EM structures of the supercomplex with cyt. c reveal distinct states where the positively-charged cyt. c is bound either to CIII or CIV, or resides at intermediate positions. Collectively, the structural and kinetic data indicate that cyt. c travels along a negatively-charged surface patch of the supercomplex. Thus, rather than enhancing electron-transfer rates by decreasing the distance cyt. c must diffuse in 3D, formation of the CIII2CIV1/2 supercomplex facilitates electron transfer by 2D diffusion of cyt. c. This mechanism enables the CIII2CIV1/2 supercomplex to increase QH2:O2 oxidoreductase activity and suggests a possible regulatory role for supercomplex formation in the respiratory chain.Significance StatementIn the last steps of food oxidation in living organisms, electrons are transferred to oxygen through the membrane-bound respiratory chain. This electron transfer is mediated by mobile carriers such as membrane-bound quinone and water-soluble cyt. c. The latter transfers electrons from respiratory complex III to IV. In yeast these complexes assemble into III2IV1/2 supercomplexes, but their role has remained enigmatic. This study establishes a functional role for this supramolecular assembly in the mitochondrial membrane. We used cryo-EM and kinetic studies to show that cyt. c shuttles electrons by sliding along the surface of III2IV1/2 (2D diffusion). The structural arrangement into III2IV1/2 supercomplexes suggests a mechanism to regulate cellular respiration.

scholarly journals Light-fueled transient supramolecular assemblies in water as fluorescence modulators

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xu-Man Chen ◽  
Xiao-Fang Hou ◽  
Hari Krishna Bisoyi ◽  
Wei-Jie Feng ◽  
Qin Cao ◽  
...  
Keyword(s):  
Self Assembly ◽  
Thermal Dissociation ◽  
Hepatocellular Cancer ◽  
Supramolecular Assembly ◽  
Supramolecular Assemblies ◽  
Light Power ◽  
Highly Sensitive ◽  
Supramolecular Nanoparticles ◽  
Far From Equilibrium ◽  
Over Time

AbstractDissipative self-assembly, which requires a continuous supply of fuel to maintain the assembled states far from equilibrium, is the foundation of biological systems. Among a variety of fuels, light, the original fuel of natural dissipative self-assembly, is fundamentally important but remains a challenge to introduce into artificial dissipative self-assemblies. Here, we report an artificial dissipative self-assembly system that is constructed from light-induced amphiphiles. Such dissipative supramolecular assembly is easily performed using protonated sulfonato-merocyanine and chitosan based molecular and macromolecular components in water. Light irradiation induces the assembly of supramolecular nanoparticles, which spontaneously disassemble in the dark due to thermal back relaxation of the molecular switch. Owing to the presence of light-induced amphiphiles and the thermal dissociation mechanism, the lifetimes of these transient supramolecular nanoparticles are highly sensitive to temperature and light power and range from several minutes to hours. By incorporating various fluorophores into transient supramolecular nanoparticles, the processes of aggregation-induced emission and aggregation-caused quenching, along with periodic variations in fluorescent color over time, have been demonstrated. Transient supramolecular assemblies, which act as fluorescence modulators, can also function in human hepatocellular cancer cells.

Photocontrolled reversible conversion of a lamellar supramolecular assembly based on cucurbiturils and a naphthalenediimide derivative

2018 ◽  
Vol 54 (96) ◽  
pp. 13591-13594 ◽  
Author(s):  
Cai-Cai Zhang ◽  
Ying-Ming Zhang ◽  
Yu Liu
Keyword(s):  
Supramolecular Assembly ◽  
Supramolecular Assemblies

Lamellar and helical supramolecular assemblies were constructed using cucurbiturils and a naphthalenediimide derivative. The formation of the lamellar assembly could be reversibly photocontrolled.

Supramolecular assembly of water-soluble poly(ferrocenylsilanes): multilayer structures on flat interfaces and permeability of microcapsules

Soft Matter ◽  
2007 ◽  
Vol 3 (7) ◽  
pp. 889-895 ◽  
Author(s):  
Yujie Ma ◽  
Wen-Fei Dong ◽  
E. Stefan Kooij ◽  
Mark. A. Hempenius ◽  
Helmuth Möhwald ◽  
...  
Keyword(s):  
Supramolecular Assembly ◽  
Water Soluble ◽  
Multilayer Structures ◽  
Soluble Poly
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