A new approach for the synthesis of sulfur-bridged polysiloxanes via thiol–ene “click” reaction and their post-functionalization to obtain luminescent materials

RSC Advances ◽  
2016 ◽  
Vol 6 (51) ◽  
pp. 45193-45201 ◽  
Author(s):  
Yujing Zuo ◽  
Zhiming Gou ◽  
Jinfeng Cao ◽  
Xiaoxiao Li ◽  
Shengyu Feng
Keyword(s):  
Click Reaction ◽  
Luminescent Materials ◽  
New Approach ◽  
Siloxane Polymers ◽  
Polymerization Method ◽  
Sulfur Containing ◽  
Post Functionalization

A novel polymerization method for preparing well defined sulfur containing siloxane polymers.

scholarly journals New approach in the application of lignin for the synthesis of hybrid materials

2017 ◽  
Vol 89 (1) ◽  
pp. 161-171 ◽  
Author(s):  
Beata Podkościelna ◽  
Marta Goliszek ◽  
Olena Sevastyanova
Keyword(s):  
Suspension Polymerization ◽  
Nitrogen Adsorption ◽  
Experimental Protocol ◽  
New Approach ◽  
Surface Areas ◽  
Adsorption Data ◽  
Novel Method ◽  
Derivatives Of ◽  
Polymerization Method ◽  
Nitrogen Adsorption Data

AbstractIn this study, a novel method for the synthesis of hybrid, porous microspheres, including divinylbenzene (DVB), triethoxyvinylsilane (TEVS) and methacrylated lignin (L-Met), is presented. The methacrylic derivatives of kraft lignin were obtained by reaction with methacryloyl chloride according to a new experimental protocol. The course of the modification of lignin was confirmed by attenuated total reflectance (ATR-FTIR) and nuclear magnetic resonance (NMR) spectroscopy. The emulsion-suspension polymerization method was employed to obtain copolymers of DVD, TEVS and L-Met in spherical forms. The porous structures and morphologies of the obtained lignin-containing functionalized microspheres were investigated by low-temperature nitrogen adsorption data and scanning electron microscopy (SEM). The microspheres are demonstrated to be mesoporous materials with specific surface areas in the range of 430–520 m2/g. The effects of the lignin component on the porous structure, shape, swelling and thermal properties of the microspheres were evaluated.

New approach for post-functionalization of meso-formylporphyrins

RSC Advances ◽  
2015 ◽  
Vol 5 (82) ◽  
pp. 67242-67246 ◽  
Author(s):  
Kirill P. Birin ◽  
Yulia G. Gorbunova ◽  
Aslan Yu. Tsivadze
Keyword(s):  
New Approach ◽  
Post Functionalization

An approach for the transformation of formyl groups into areneimidazoles at a porphyrin substrate is developed, allowing straightforward design of new polytopic porphyrinoid compounds.

scholarly journals A New Approach for Prostate Cancer Diagnosis by miRNA Profiling of Prostate-Derived Plasma Small Extracellular Vesicles

Cells ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 2372
Author(s):  
Lidia Zabegina ◽  
Inga Nazarova ◽  
Nadezhda Nikiforova ◽  
Maria Slyusarenko ◽  
Elena Sidina ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Extracellular Vesicles ◽  
Click Reaction ◽  
Prostate Gland ◽  
Dna Aptamer ◽  
New Approach ◽  
Mirna Profiling ◽  
Healthy Donors ◽  
Diagnosis Method ◽  
Paramagnetic Beads

Vesicular miRNA has emerged as a promising marker for various types of cancer, including prostate cancer (PC). In the advanced stage of PC, the cancer-cell-derived small extracellular vesicles (SEVs) may constitute a significant portion of circulating vesicles and may mediate a detectable change in the plasma vesicular miRNA profile. However, SEVs secreted by small tumor in the prostate gland constitute a tiny fraction of circulating vesicles and cause undetectable miRNA pattern changes. Thus, the isolation and miRNA profiling of a specific prostate-derived fraction of SEVs can improve the diagnostic potency of the methods based on vesicular miRNA analysis. Prostate-specific membrane antigen (PSMA) was selected as a marker of prostate-derived SEVs. Super-paramagnetic beads (SPMBs) were functionalized by PSMA-binding DNA aptamer (PSMA–Apt) via a click reaction. The efficacy of SPMB–PSMA–Apt complex formation and PSMA(+)SEVs capture were assayed by flow cytometry. miRNA was isolated from the total population of SEVs and PSMA(+)SEVs of PC patients (n = 55) and healthy donors (n = 30). Four PC-related miRNAs (miR-145, miR-451a, miR-143, and miR-221) were assayed by RT-PCR. The click chemistry allowed fixing DNA aptamers onto the surface of SPMB with an efficacy of up to 89.9%. The developed method more effectively isolates PSMA(+)SEVs than relevant antibody-based technology. The analysis of PC-related miRNA in the fraction of PSMA(+)SEVs was more sensitive and revealed distinct diagnostic potency (AUC: miR-145, 0.76; miR-221, 0.7; miR-451a, 0.65; and miR-141, 0.64) than analysis of the total SEV population. Thus, isolation of prostate-specific SEVs followed by analysis of vesicular miRNA might be a promising PC diagnosis method.

scholarly journals Bioinspired and Post-Functionalized 3D-Printed Surfaces with Parahydrophobic Properties

Biomimetics ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 71
Author(s):  
Léna Ciffréo ◽  
Claire Marchand ◽  
Caroline R. Szczepanski ◽  
Marie-Gabrielle Medici ◽  
Guilhem Godeau
Keyword(s):  
Three Dimensional ◽  
Control Surface ◽  
Water Harvesting ◽  
Water Access ◽  
New Approach ◽  
Significant Research ◽  
Dimensional Shape ◽  
3D Printed ◽  
Three Dimensional Shape ◽  
Post Functionalization

Desertification is a growing risk for humanity. Studies show that water access will be the leading cause of massive migration in the future. For this reason, significant research efforts are devoted to identifying new sources of water. Among this work, one of the more interesting strategies takes advantage of atmospheric non-liquid water using water harvesting. Various strategies exist to harvest water, but many suffer from low yield. In this work, we take inspiration from a Mexican plant (Echeveria pulvinate) to prepare a material suitable for future water harvesting applications. Observation of E. pulvinate reveals that parahydrophobic properties are favorable for water harvesting. To mimic these properties, we leveraged a combination of 3D printing and post-functionalization to control surface wettability and obtain parahydrophobic properties. The prepared surfaces were investigated using IR and SEM. The surface roughness and wettability were also investigated to completely describe the elaborated surfaces and strongly hydrophobic surfaces with parahydrophobic properties are reported. This new approach offers a powerful platform to develop parahydrophobic features with desired three-dimensional shape.

Post-Functionalization of an Anderson-Type Polyoxomolybdate Using a Metal-Free Diels-Alder Click Reaction

2013 ◽  
Vol 2013 (8) ◽  
pp. 1381-1389 ◽  
Author(s):  
Hai-Kuan Yang ◽  
Ming-Ming Su ◽  
Li-Jun Ren ◽  
Jing Tang ◽  
Yu-Kun Yan ◽  
...  
Keyword(s):  
Click Reaction ◽  
Diels Alder ◽  
Metal Free ◽  
Post Functionalization

Double click reaction strategies for polymer conjugation and post-functionalization of polymers

2012 ◽  
Vol 3 (4) ◽  
pp. 825-835 ◽  
Author(s):  
Hakan Durmaz ◽  
Amitav Sanyal ◽  
Gurkan Hizal ◽  
Umit Tunca
Keyword(s):  
Click Reaction ◽  
Functionalization Of Polymers ◽  
Polymer Conjugation ◽  
Post Functionalization

scholarly journals Post-functionalization of a photoactive hybrid polyoxotungstate

2018 ◽  
Vol 47 (31) ◽  
pp. 10590-10594 ◽  
Author(s):  
Jamie M. Cameron ◽  
Satomi Fujimoto ◽  
Rong-Jia Wei ◽  
Graham N. Newton ◽  
Hiroki Oshio
Keyword(s):  
New Approach ◽  
Post Functionalization ◽  
Inorganic And Organic

A new approach to the development of photoactive hybrid polyoxometalates is reported, combining inorganic and organic functionalisation strategies.

scholarly journals Preparation of Nanofibers Mats Derived from Task-Specific Polymeric Ionic Liquid for Sensing and Catalytic Applications

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3110
Author(s):  
David Valverde ◽  
Iván Muñoz ◽  
Eduardo García-Verdugo ◽  
Belen Altava ◽  
Santiago V. Luis
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Click Reaction ◽  
Electrospun Fibers ◽  
Experimental Conditions ◽  
Homocysteine Thiolactone ◽  
Polymeric Ionic Liquids ◽  
Polymeric Ionic Liquid ◽  
Catalytic Applications ◽  
Post Functionalization

Nanofibers mats derived from the task-specific functionalized polymeric ionic liquids based on homocysteine thiolactone are obtained by electrospinning them as blends with polyvinylpyrrolidone. The presence of this functional moiety allowed the post-functionalization of these mats through the aminolysis of the thiolactone ring in the presence of an amine by a thiol–alkene “click” reaction. Under controlled experimental conditions the modification can be performed introducing different functionalization and crosslinking of the electrospun fibers, while maintaining the nanostructure obtained by the electrospinning. Initial studies suggest that the nanofibers based on these functionalized polymeric ionic liquids can be used in both sensing and catalytic applications.

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