scholarly journals Cooperative assembly of H-bonded rosettes inside a porphyrin nanoring

2021 ◽  
Author(s):  
Petr Motloch ◽  
Pernille S. Bols ◽  
Harry L. Anderson ◽  
Christopher A. Hunter
Keyword(s):  
Self Assembly ◽  
Zinc Porphyrin ◽  
Pyridine Ligands ◽  
Porphyrin Macrocycle ◽  
Cooperative Assembly

Mixing barbiturates and pyrimidines equipped with pyridine ligands to leads to self-assembly of a hexadentate rosette ligand, which is complementary to a hexameric zinc porphyrin macrocycle.

scholarly journals Complex signal processing in synthetic gene circuits using cooperative regulatory assemblies

Science ◽  
2019 ◽  
Vol 364 (6440) ◽  
pp. 593-597 ◽  
Author(s):  
Caleb J. Bashor ◽  
Nikit Patel ◽  
Sandeep Choubey ◽  
Ali Beyzavi ◽  
Jané Kondev ◽  
...  
Keyword(s):  
Signal Processing ◽  
Self Assembly ◽  
Design Principle ◽  
Complex Signal ◽  
Synthetic Gene Circuits ◽  
Cellular Decision Making ◽  
Eukaryotic Genes ◽  
Transcription Factor Complexes ◽  
Dynamic Filtering ◽  
Cooperative Assembly

Eukaryotic genes are regulated by multivalent transcription factor complexes. Through cooperative self-assembly, these complexes perform nonlinear regulatory operations involved in cellular decision-making and signal processing. In this study, we apply this design principle to synthetic networks, testing whether engineered cooperative assemblies can program nonlinear gene circuit behavior in yeast. Using a model-guided approach, we show that specifying the strength and number of assembly subunits enables predictive tuning between linear and nonlinear regulatory responses for single- and multi-input circuits. We demonstrate that assemblies can be adjusted to control circuit dynamics. We harness this capability to engineer circuits that perform dynamic filtering, enabling frequency-dependent decoding in cell populations. Programmable cooperative assembly provides a versatile way to tune the nonlinearity of network connections, markedly expanding the engineerable behaviors available to synthetic circuits.

scholarly journals Exploring the self-assembly and energy transfer of dynamic supramolecular iridium-porphyrin systems

2016 ◽  
Vol 45 (43) ◽  
pp. 17195-17205 ◽  
Author(s):  
Diego Rota Martir ◽  
Gordon J. Hedley ◽  
David B. Cordes ◽  
Alexandra M. Z. Slawin ◽  
Daniel Escudero ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Self Assembly ◽  
The Self ◽  
Zinc Porphyrin

We present the first examples of dynamic supramolecular iridium–zinc porphyrin systems.

π-Conjugated multiporphyrin box via self-assembly of an ethynylene-bridged zinc porphyrin dimer

2003 ◽  
Vol 07 (05) ◽  
pp. 388-393 ◽  
Author(s):  
Akihiko Tsuda ◽  
Haifeng Hu ◽  
Reiko Watanabe ◽  
Takuzo Aida
Keyword(s):  
Self Assembly ◽  
Zinc Porphyrin ◽  
Planar Conformation ◽  
Parallel Geometry ◽  
Porphyrin Dimer

An ethynylene-bridged zinc porphyrin dimer bearing metal-coordinating groups, such as bis[{5-(4-pyridyl)-15-(3,5-didodecyloxyphenyl)porphyrinato}zinc] Z2, self-assembles in CHCl 3 to form a rectangular-shaped supramolecular nano box, in which all the Z2 units preferentially adopt a planar conformation with a syn-parallel geometry as for the pyridyl groups.

Morphology Controlled Nanostructure of Zinc Porphyrin

2013 ◽  
Vol 562-565 ◽  
pp. 1314-1318
Author(s):  
Jun Jie Li ◽  
Chang Jun Hou ◽  
Zhi Fei Li ◽  
Huan Bao Fa ◽  
Mei Yang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Fluorescence Spectroscopy ◽  
Aqueous Solutions ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Zinc Porphyrin ◽  
Assembly Method ◽  
Fluorescent Spectra ◽  
Anionic And Cationic Surfactants ◽  
Surfactant Assisted

We have shown that various Zinc porphyrin-based nanostructures can be easily synthesized by a surfactant-assisted self-assembly method, where nonionic, anionic and cationic surfactants are employed. It was found that tuning the type of surfactant offered an alternative to promote the formation of Zinc porphyrin nanostructure with different morphologies in aqueous solutions. As-prepared nano-scale self-assemblies, including disc-shaped, ellipsoid, square and quadrangular pyramidal nanoparticles, were investigated in solution via UV/vis, fluorescence spectroscopy and SEM microscopy. The different UV/vis as well as fluorescent spectra between nano-porphyrin and its monomer further conformed that the nano-crystallization of porphyrin would result in novel optical properties differing from the single subunits.

Topological aspects of some dendrimer structures

2018 ◽  
Vol 7 (2) ◽  
pp. 123-129 ◽  
Author(s):  
Adnan Aslam ◽  
Muhammad Kamran Jamil ◽  
Wei Gao ◽  
Waqas Nazeer
Keyword(s):  
Self Assembly ◽  
Molecular Graph ◽  
Chemical Properties ◽  
Topological Indices ◽  
Connectivity Index ◽  
Molecular Topology ◽  
Zinc Porphyrin ◽  
Physico Chemical ◽  
Randić Connectivity Index ◽  
Atom Bond

AbstractA numerical number associated to the molecular graphGthat describes its molecular topology is called topological index. In the study ofQSARandQSPR, topological indices such as atom-bond connectivity index, Randić connectivity index, geometric index, etc. help to predict many physico-chemical properties of the chemical compound under study. Dendrimers are macromolecules and have many applications in chemistry, especially in self-assembly procedures and host-guest reactions. The aim of this report is to compute degree-based topological indices, namely the fourth atom-bond connectivity index and fifth geometric arithmetic index of poly propyl ether imine, zinc porphyrin, and porphyrin dendrimers.

Self-Assembly of Silicate/Surfactant Mesophases

1994 ◽  
Vol 371 ◽  
Author(s):  
Scott A. Walker ◽  
J.A. Zasadzinski
Keyword(s):  
Self Assembly ◽  
Precursor Solution ◽  
Lamellar Spacing ◽  
The Self ◽  
Lamellar Phase ◽  
Assembly Process ◽  
Synthesis Conditions ◽  
Ctab Concentration ◽  
Organic Surfactant ◽  
Cooperative Assembly

AbstractThe synthesis of silicate/surfactant mesophases is driven by cooperative assembly of organic surfactant and inorganic silicate species, and the resultant mesophase morphology can be controlled by synthesis conditions (i.e., CTAB concentration in precursor solution and SiO2- CTAB mole ratio). The self-assembly process of these mesophases is driven complexation of the polyanionic silicate species with several CTAB cations to form a multi-tailed surfactant. One of these mesophases is a novel rippled lamellar phase in which the ripple wavelength and lamellar spacing are similar to the hexagonal mesophase rod center-to-center spacing; each of these dimensions are consistent with the length of two CTAB molecules.

DABCO-Directed Self-Assembly of Pyrene-Centered Porphyrin Pentamers

2013 ◽  
Vol 575-576 ◽  
pp. 123-129
Author(s):  
Zhuang Dong Yuan ◽  
Jing Xia Wang ◽  
Ning Sheng
Keyword(s):  
Self Assembly ◽  
Fluorescence Emission ◽  
The Self ◽  
Spectroscopic Methods ◽  
Assembly Process ◽  
Zinc Porphyrin ◽  
Axial Coordination ◽  
H Nmr ◽  
Wide Range ◽  
Nmr Techniques

DABCO (1, 4-diazabicyclo [2.2.2] octane) has been used in combination with pentameric zinc porphyrin-pyrene array 1 to form well-defined supramolecular arrays through axial coordination. The self-assembly process has been investigated by a wide range of spectroscopic methods including UV-vis, fluorescence emission and 1H NMR techniques.

Enhanced performance for organic bulk heterojunction solar cells by cooperative assembly of ter(ethylene oxide) pendants

2014 ◽  
Vol 5 (15) ◽  
pp. 4480-4487 ◽  
Author(s):  
Lie Chen ◽  
Shaojie Tian ◽  
Yiwang Chen
Keyword(s):  
Solar Cells ◽  
Ethylene Oxide ◽  
Self Assembly ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
The Self ◽  
Photoactive Layer ◽  
Heterojunction Solar Cells ◽  
Donor And Acceptor ◽  
Cooperative Assembly

A ter(ethylene oxide) functionalized donor and acceptor are explored to manipulate the self-assembly morphology of the photoactive layer in polymer solar cells.

DABCO-Mediated Self-Assembly of Zinc Porphyrin-Perylene Bisimide Monodisperse Multichromophoric Nanoparticles

2010 ◽  
Vol 16 (8) ◽  
pp. 2386-2390 ◽  
Author(s):  
Peter Osswald ◽  
Chang-Cheng You ◽  
Vladimir Stepanenko ◽  
Frank Würthner
Keyword(s):  
Self Assembly ◽  
Zinc Porphyrin ◽  
Perylene Bisimide
Sign in / Sign up

Export Citation Format

Share Document