Study of the supramolecular chiral assembly of meso-“C-glucoside”-porphyrin derivatives in aqueous media

2008 ◽  
Vol 32 (12) ◽  
pp. 2127 ◽  
Author(s):  
Donato Monti ◽  
Mariano Venanzi ◽  
Emanuela Gatto ◽  
Giovanna Mancini ◽  
Alessandro Sorrenti ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Porphyrin Derivatives

Kinetic and spectroscopic studies on the chiral self-aggregation of amphiphilic zinc and copper (l)-prolinate-tetraarylporphyrin derivatives in different aqueous media

2019 ◽  
Vol 17 (5) ◽  
pp. 1113-1120 ◽  
Author(s):  
Fabrizio Caroleo ◽  
Manuela Stefanelli ◽  
Gabriele Magna ◽  
Mariano Venanzi ◽  
Roberto Paolesse ◽  
...  
Keyword(s):  
Metal Ion ◽  
Aqueous Media ◽  
Spectroscopic Studies ◽  
Porphyrin Derivatives ◽  
The Media ◽  
Self Aggregation

The chiral self-aggregation of (l)-proline porphyrin derivatives depends on both the nature of the media and the coordinated metal ion.

scholarly journals Study on the synthesis of porphyrin-modified copper ferrite as photocatalyst for treatment of mb organic dye in aqueous media

2020 ◽  
Vol 9 (3) ◽  
pp. 107-111
Author(s):  
Chinh Tran Van ◽  
Anh Nguyen Tuan ◽  
Phuong Nguyen Thi Hoai ◽  
Thuan Mai Huu ◽  
Khanh Tran Van ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Ferrite Nanoparticles ◽  
Organic Dye ◽  
Copper Ferrite ◽  
Simple Method ◽  
External Magnet ◽  
Porphyrin Derivatives

This work aims to modify the copper ferrite with a porphyrin derivatives by a simple method of self-assembly. The resultant porphyrin-modified copper ferrite was utilized as a photocatalyst for the removal of methyl blue dyes (MB) from aqueous solution. The results showed that the porphyrin nanofibers were well-intergrated with the copper ferrite nanoparticles. The porphyrin-modified copper ferrite materials exhibited the high photocatalytic performance toward MB dye with the removal percentage of approximately 100% after 200 minutes of irradiation under simulated light. The catalyst could be facilely separate by using a external magnet and reused.

New porphyrin derivatives for phosphate anion sensing in both organic and aqueous media

2014 ◽  
Vol 50 (11) ◽  
pp. 1359-1361 ◽  
Author(s):  
João M. M. Rodrigues ◽  
Andreia S. F. Farinha ◽  
Paulino V. Muteto ◽  
Sandra M. Woranovicz-Barreira ◽  
Filipe A. Almeida Paz ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Phosphate Anion ◽  
Anion Sensing ◽  
Porphyrin Derivatives

scholarly journals The Self-Aggregation of Porphyrins with Multiple Chiral Centers in Organic/Aqueous Media: The Case of Sugar- and Steroid-Porphyrin Conjugates

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4544 ◽  
Author(s):  
Manuela Stefanelli ◽  
Federica Mandoj ◽  
Gabriele Magna ◽  
Raffaella Lettieri ◽  
Mariano Venanzi ◽  
...  
Keyword(s):  
Self Assembly ◽  
Driving Forces ◽  
Aqueous Media ◽  
Kinetic Studies ◽  
Spatial Arrangement ◽  
The Self ◽  
Optical Methods ◽  
Assembly Process ◽  
Molecular Mechanics Calculations ◽  
Porphyrin Derivatives

An overview of the solvent-driven aggregation of a series of chiral porphyrin derivatives studied by optical methods (UV/Vis, fluorescence, CD and RLS spectroscopies) is herein reported. The investigated porphyrins are characterized by the presence in the meso-positions of glycol-, steroidal- and glucosteroidal moieties, conferring amphiphilicity and solubility in aqueous media to the primarily hydrophobic porphyrin platform. Aggregation of the macrocycles is driven by a change in bulk solvent composition, forming architectures with supramolecular chirality, steered by the stereogenic centers on the porphyrin peripheral positions. The aggregation behavior and chiroptical properties of the final aggregated species strongly depend on the number and stereogenicity of the ancillary groups that dictate the mutual spatial arrangement of the porphyrin chromophores and their further organization in larger structures, usually detectable by different microscopies, such as AFM and SEM. Kinetic studies are fundamental to understand the aggregation mechanism, which is frequently found to be dependent on the substrate concentration. Additionally, Molecular Mechanics calculations can give insights into the intimate nature of the driving forces governing the self-assembly process. The critical use of these combined methods can shed light on the overall self-assembly process of chirally-functionalized macrocycles, with important implications on the development of chiral porphyrin-based materials.

Highly efficient and selective photocatalytic CO2 to CO conversion in aqueous solution

2020 ◽  
Vol 56 (27) ◽  
pp. 3851-3854 ◽  
Author(s):  
Xiaomin Chai ◽  
Hai-Hua Huang ◽  
Huiping Liu ◽  
Zhuofeng Ke ◽  
Wen-Wen Yong ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Highly Efficient ◽  
Co Conversion

A Co-based complex displayed the highest photocatalytic performance for CO2 to CO conversion in aqueous media.

Detection of a covalent-ionic carbinolamine intermediate in aqueous media by SDTLC on silica gel plates

2007 ◽  
Vol 20 (3) ◽  
pp. 227-230 ◽  
Author(s):  
Ana Reverdito ◽  
Mariano García ◽  
Alejandra Salerno ◽  
Oscar Locani ◽  
Isabel Perillo
Keyword(s):  
Silica Gel ◽  
Aqueous Media

Temperature Dependence of the Self-Assembled Styrene Based Random Ionomers in Aqueous Solution

2003 ◽  
Vol 775 ◽  
Author(s):  
Sung-Hwa Oh ◽  
Ju-Myung Song ◽  
Joon-Seop Kim ◽  
Hyang-Rim Oh ◽  
Jeong-A Yu
Keyword(s):  
Partition Coefficients ◽  
Room Temperature ◽  
Aqueous Media ◽  
The Self ◽  
Spectroscopic Methods ◽  
Ion Content ◽  
Repeat Units ◽  
Notable Effect ◽  
Order Of Magnitude ◽  
Experimental Errors

AbstractSolution behaviors of poly(styrene-co-sodium methacrylate) were studied by fluorescence spectroscopic methods using pyrene as a probe. The mol% of methacrylate was in the range 3.6–9.4. Water and N,N-dimethylforamide(DMF) mixture was used as a solvent (DMF/water = 0.2 mol %). The critical micelle (or aggregation) concentrations of ionomers and the partition coefficients of pyrene were obtained the temperature range 10–80°C. At room temperature, the values of CMCs (or CACs) were in the range 4.7 ×10-6 5.3 ×10-6 g/mL and we could not find any notable effect of the content of ionic repeat units within the experimental errors. Unlike CMCs, as the ion content increased, partitioning of pyrene between the hydrophobic aggregates and an aqueous media decreased from 1.5 ×105 to 9.4 ×104. As the temperature increased from 10 to 80 °C, the values of CMCs increased less than one order of magnitude. While, the partition coefficients of pyrene decreased one order of magnitude and the effect of the ion content became negligible.

Host-Guest Interactions on Electrode Surfaces for Immobilization of Molecular Catalysts

2020 ◽  
Author(s):  
Laurent Sévery ◽  
Jacek Szczerbiński ◽  
Mert Taskin ◽  
Isik Tuncay ◽  
Fernanda Brandalise Nunes ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Heterogeneous Systems ◽  
Catalytic Systems ◽  
New Approach ◽  
Molecular Systems ◽  
Electrode Surfaces ◽  
Catalytic Surfaces ◽  
Oxide Electrodes ◽  
The Stability ◽  
Molecular Catalysts

The strategy of anchoring molecular catalysts on electrode surfaces combines the high selectivity and activity of molecular systems with the practicality of heterogeneous systems. The stability of molecular catalysts is, however, far less than that of traditional heterogeneous electrocatalysts, and therefore a method to easily replace anchored molecular catalysts that have degraded could make such electrosynthetic systems more attractive. Here, we apply a non-covalent “click” chemistry approach to reversibly bind molecular electrocatalysts to electrode surfaces via host-guest complexation with surface-anchored cyclodextrins. The host-guest interaction is remarkably strong and allows the flow of electrons between the electrode and the guest catalyst. Electrosynthesis in both organic and aqueous media was demonstrated on metal oxide electrodes, with stability on the order of hours. The catalytic surfaces can be recycled by controlled release of the guest from the host cavities and readsorption of fresh guest. This strategy represents a new approach to practical molecular-based catalytic systems.

Sign in / Sign up

Export Citation Format

Share Document