scholarly journals Photosensitizing properties of hollow microcapsules built by multilayer self-assembly of poly(allylamine hydrochloride) modified with rose Bengal

RSC Advances ◽  
2019 ◽  
Vol 9 (33) ◽  
pp. 19226-19235
Author(s):  
Mariana P. Serrano ◽  
Matías Rafti ◽  
Andrés H. Thomas ◽  
Claudio D. Borsarelli
Keyword(s):  
Rose Bengal ◽  
Self Assembly ◽  
Fluorescence Emission ◽  
Supramolecular Assembly ◽  
Allylamine Hydrochloride ◽  
Novel Strategy

We explored a novel strategy directed to the improvement of rose Bengal fluorescence emission and photosensitization properties by supramolecular assembly into hollow microcapsules using LbL technique.

scholarly journals A Binary Supramolecular Assembly with Intense Fluorescence Emission, High pH Stability, and Cation Selectivity: Supramolecular Assembly-Induced Emission Materials

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Xu Wang ◽  
Xin-Yue Lou ◽  
Xiao-Yu Jin ◽  
Feng Liang ◽  
Ying-Wei Yang
Keyword(s):  
Self Assembly ◽  
Inclusion Complexation ◽  
Fluorescence Emission ◽  
Blue Emission ◽  
Supramolecular Assembly ◽  
Supramolecular System ◽  
Cation Selectivity ◽  
Ion Sensing ◽  
Wide Range ◽  
Ammonium Binding

We construct a fluorescent supramolecular system (TPE-Q4⊂ DSP5) of excellent tolerance to a wide range of pH by the facile self-assembly of a new pillar[5]arene bearing disulfonated arms (DSP5) with an AIE-active tetraphenylethene-based tetratopic guest bearing four quaternary ammonium binding sites (TPE-Q4), which exhibits strong blue emission even in dilute aqueous solutions along with much higher quantum yield and longer fluorescence lifetime than TPE-Q4 itself. This appreciable property can be attributed to the supramolecular assembly-induced emission (SAIE) mechanism endowed by the host-guest inclusion complexation based on synthetic macrocycles. Remarkably, the enhanced fluorescence of the supramolecular assembly is quenched efficiently and exclusively by ferric ions in water with a high Stern–Volmer formula constant of 1.3 × 105  mol-1, demonstrating the excellent cation selectivity and visualized responsiveness in ion sensing and detection.

scholarly journals Regulation of bi-color fluorescence changes of AIE supramolecular self-assembly gels by the interaction with Al3+ and energy transfer

2021 ◽  
Author(s):  
Xinxian Ma ◽  
Jinlong Yue ◽  
Bo Qiao ◽  
LIli Zhou ◽  
Yang Gao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Self Assembly ◽  
Fluorescence Emission ◽  
Fluorescent Materials

Supramolecular fluorescent materials have attracted considerable attention in recent years since they endow specific and unique properties to materials. Nevertheless, the utilization of photo-responsive characteristics to modulate their fluorescence emission...

A New Approach to Fluorescent Chemosensor of Cu2+ Ion

2014 ◽  
Vol 513-517 ◽  
pp. 65-69
Author(s):  
Xiao Jun Hu ◽  
Xin Yan Hu ◽  
Zhi Zhang
Keyword(s):  
Aqueous Solution ◽  
Electron Transfer ◽  
Self Assembly ◽  
Ph Value ◽  
Sodium Dodecyl ◽  
Fluorescence Emission ◽  
Fluorescent Chemosensor ◽  
Dynamic Quenching ◽  
Transfer Effects ◽  
New Approach

According to the principle of dynamic quenching a new ON-OFF fluorescent chemosensor for Cu2+ions was designed, this chemosensor was composed of p-tert-butylthiacalix [arene (TCA),sodium dodecyl sulfate (SDS) and perylene through the form of self-assembly in aqueous solution. Addition of Cu2+ions could result in a quenching of the fluorescence emission of perylene inside micelles, which due to intramicellar complex-fluorophore electron-transfer or energy-transfer effects induced by the complexation of TCA with the Cu2+ions.The experimental results indicated that: Under the condition of TCA/perylene was 800/1, SDS concentration was 150mmol/L and pH value above 9, according to the fluorescence quenching ,within a certain range of the concentration of Cu2+ion can be linearly determined.

Morphology engineering: dramatic roles of serine and threonine in supramolecular assembly

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 41761-41764 ◽  
Author(s):  
M. B. Bijesh ◽  
Rituraj Mishra ◽  
Narayanan D. Kurur ◽  
V. Haridas
Keyword(s):  
Self Assembly ◽  
Supramolecular Assembly ◽  
Morphology Engineering ◽  
Self Assembled

Macrocycles containing serine self-assembled into fibres, while threonine induced vesicular self-assembly. Macrocycles with serine can be driven to form vesicular assembly by incorporating a non-planar spacer.

A new twofold interpenetrated two-dimensional cadmium(II) coordination polymer constructed from 2,2′-(benzene-1,4-dicarboxamido)dipropionate

2018 ◽  
Vol 74 (11) ◽  
pp. 1434-1439
Author(s):  
Hong-Tao Zhang ◽  
Xiao-Long Wang
Keyword(s):  
Coordination Polymer ◽  
Coordination Polymers ◽  
Self Assembly ◽  
Fluorescence Emission ◽  
Functional Materials ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carboxylate Groups ◽  
Potential Applications

In recent years, much initial interest and enthusiasm has focused on the self-assembly of coordination polymers due to the aesthetics of their crystalline architectures and their potential applications as new functional materials. As part of an exploration of chiral coordination polymers, a new twofold interpenetrated two-dimensional (2D) coordination polymer, namely, poly[[tetraaquabis[μ3-(2R,2′R)-2,2′-(benzene-1,4-dicarboxamido)dipropionato-κ5 O,O′:O′′,O′′′:O′′]dicadmium(II)] trihydrate], {[Cd2(C14H14N2O6)2(H2O)4]·3H2O} n , has been synthesized by the reaction of Cd(CH3COO)2·2H2O with the designed ligand (2R,2′R)-2,2′-(benzene-1,4-dicarboxamido)dipropionic acid (H2 L). The compound has been structurally characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction and single-crystal X-ray diffraction analysis. In the crystal structure, each CdII cation binds to three carboxylate groups from two crystallographically independent L 2− dianions. Four carboxylate groups link two crystallographically independent cadmium cations into a 4,4-connected secondary building unit (SBU). The resulting SBUs are extended into a two-dimensional folding sheet via the terephthalamide moiety of the ligand as a spacer, which can be simplified as a (4,4)-connected 4,4L15 net with the point symbol (3.53.62)(32.52.62). In the lattice, two independent folding sheets interpenetrate each other to yield a double-sheet layer. The resulting 2D layers pack in parallel arrays through intermolecular hydrogen bonds and interlayer π–π interactions. The thermal stability and photoluminescence properties of the title compound have been investigated and it exhibits an enhanced fluorescence emission and a longer lifetime compared with free H2 L.

scholarly journals Stability of Chlorophyll a Monomer Incorporated into Cremophor EL Nano-Micelles under Dark and Moderate Light Conditions

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 5059
Author(s):  
Ewa Janik-Zabrotowicz ◽  
Marta Arczewska ◽  
Patrycja Prochniewicz ◽  
Izabela Świetlicka ◽  
Konrad Terpiłowski
Keyword(s):  
Chlorophyll A ◽  
Self Assembly ◽  
Molecular Spectroscopy ◽  
Fluorescence Emission ◽  
Molecular Organization ◽  
Cremophor El ◽  
Light Conditions ◽  
Fluorescence Emission Spectra ◽  
Pigment Stability ◽  
The Stability

In this paper, stability of chlorophyll a monomers encapsulated into the Cremophor EL nano-micelles was studied under dark and moderate light conditions, typical of a room with natural or artificial lighting, in the presence of oxygen. The pigment stability against visible light was determined using the dynamic light scattering and molecular spectroscopy (UV-Vis absorption and stationary fluorescence) methods. Chlorophyll a, at the molar concentration of 10−5 M, was dissolved in the 5 wt% Cremophor emulsion for comparison in the ethanolic solution. The stability of such a self-assembly pigment–detergent nano-system is important in the light of its application on the commercial-scale. The presented results indicate the high stability of the pigment monomeric molecular organization in the nano-emulsion. During the storage in the dark, the half-lifetime was calculated as about 7 months. Additionally, based on the shape of absorption and fluorescence emission spectra, chlorophyll aggregation in the Cremophor EL aqueous solution along with the time was excluded. Moreover, the average size of detergent micelles as chlorophyll carriers was not affected after 70 days of the nano-system storage. Pigment stability against the moderate white light (0.1 mW) did not differ significantly from storage conditions in the dark. The photooxidation products, detected by occurrence of new absorption and fluorescence emission bands, was estimated on the negligible level. The stability of such a self-assembly pigment–detergent nano-system would potentially broaden the field of chlorophyll a (chl a) application in the food industry, medicine or artificial photosynthesis models.

Furin-instructed molecular self-assembly actuates endoplasmic reticulum stress-mediated apoptosis for cancer therapy

Nanoscale ◽  
2020 ◽  
Vol 12 (22) ◽  
pp. 12126-12132
Author(s):  
Chenxing Fu ◽  
Jie Zhan ◽  
Junqi Huai ◽  
Shaodan Ma ◽  
Minghui Li ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Cell Growth ◽  
Cancer Therapy ◽  
Endoplasmic Reticulum Stress ◽  
Self Assembly ◽  
Novel Strategy

We designed furin-instructed self-assembly to block the ER-to-Golgi traffic for inhibiting MDA-MB-468 cell growth. This disturbance of the cellular proteostasis through molecular self-assembly may provide a novel strategy for cancer therapy.

Transparent, flexible MAPbI3 perovskite microwire arrays passivated with ultra-hydrophobic supramolecular self-assembly for stable and high-performance photodetectors

Nanoscale ◽  
2020 ◽  
Vol 12 (22) ◽  
pp. 11986-11996
Author(s):  
K. D. M. Rao ◽  
Mozakkar Hossain ◽  
Umesh ◽  
Aniket Roy ◽  
Anudeepa Ghosh ◽  
...  
Keyword(s):  
Self Assembly ◽  
High Performance ◽  
Supramolecular Assembly

Fully transparent perovskite microwire arrays passivated with supramolecular assembly for stable and high-performance photodetectors.

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