Dendritic Effect on Supramolecular Self-Assembly: Organogels with Strong Fluorescence Emission Induced by Aggregation†

Langmuir ◽  
2009 ◽  
Vol 25 (15) ◽  
pp. 8548-8555 ◽  
Author(s):  
Yulan Chen ◽  
Yuxia Lv ◽  
Yang Han ◽  
Bo Zhu ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Fluorescence Emission ◽  
Strong Fluorescence

scholarly journals Water-soluble lanthanide coordination polymers particles with white-light emission and color tuning

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32137-32140 ◽  
Author(s):  
Kaiqi Fan ◽  
Xiaobo Wang ◽  
Yongpeng Ma ◽  
Yu Li ◽  
Guanglu Han ◽  
...  
Keyword(s):  
Schiff Base ◽  
White Light ◽  
Self Assembly ◽  
Light Emission ◽  
Fluorescence Emission ◽  
Water Soluble ◽  
Strong Fluorescence ◽  
Water Soluble Polymer ◽  
Lanthanide Coordination Polymers ◽  
Hyperbranched Poly

Water-soluble polymer particles (PPs) with strong fluorescence emission were prepared from hyperbranched poly(ethylenimine) (PEI) and terpyridine-bearing aldehyde (TPy) via Schiff base reaction and self-assembly in aqueous phase.

Spermine-directed supramolecular self-assembly of water-soluble AIE-active tetraphenylethylene: nanobelt, nanosheet, globular and nanotubular structures

2018 ◽  
Vol 42 (18) ◽  
pp. 15379-15386 ◽  
Author(s):  
Duong Duc La ◽  
Jotiram N. Malegaonkar ◽  
Mohammad Al Kobaisi ◽  
Rajesh S. Bhosale ◽  
Sidhanath V. Bhosale ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Self Assembly ◽  
Fluorescence Emission ◽  
Water Soluble ◽  
Strong Fluorescence

Tetrasulfonate-tetraphenylethylene (Su-TPE) is non-emissive in water and upon addition of a good solvent such as THF (fTHF = 95%) it displays strong fluorescence emission with a quantum yield of 6.33%.

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.

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.

Self-assembly and fluorescence emission of UV-responsive azobenzene-containing helical poly(phenyl isocyanide) copolymers

2020 ◽  
Vol 11 (37) ◽  
pp. 6029-6036 ◽  
Author(s):  
Qian-Wei Li ◽  
Yi-Xu Su ◽  
Hui Zou ◽  
Yong-Yuan Chen ◽  
Li Zhou ◽  
...  
Keyword(s):  
Self Assembly ◽  
Fluorescence Emission ◽  
Fluorescent Properties

UV-responsive azobenzene-containing helical copolymers were obtained, and their self-assembly and fluorescent properties were investigated.

Polynitrile-bridged two-dimensional crystal: Eu(iii) complex with strong fluorescence emission and NLO property

2002 ◽  
pp. 756-757 ◽  
Author(s):  
Jing-min Shi ◽  
Wen Xu ◽  
Qing-yun Liu ◽  
Feng-ling Liu ◽  
Zhen-li Huang ◽  
...  
Keyword(s):  
Fluorescence Emission ◽  
Two Dimensional ◽  
Strong Fluorescence ◽  
Nlo Property ◽  
Dimensional Crystal

Polypyrrole/Graphene Quantum Dot Composites as a Sensor Media for Epinephrine

2020 ◽  
Vol 20 (7) ◽  
pp. 4005-4010 ◽  
Author(s):  
Thi Hoa Le ◽  
Dal Ho Lee ◽  
Ji Hyeon Kim ◽  
Sang Joon Park
Keyword(s):  
Quantum Dot ◽  
Photoinduced Electron Transfer ◽  
Surface Passivation ◽  
Fluorescence Emission ◽  
Fluorescence Signal ◽  
Serum Samples ◽  
Strong Fluorescence ◽  
Electron Transfer Process ◽  
Graphene Quantum Dot ◽  
Amine Groups

In this paper, we discuss a new biosensor for simple and rapid detection of epinephrine (EP) based on polypyrrole/graphene quantum dot (PPy/GQD) composites. Presence of amine groups on the PPy backbone leads to surface passivation of GQDs. As a result, the composites exhibit strong fluorescence emission, which can be up to three times that of pristine GQDs. In neutral to alkaline solution, the EP on the surface of PPy/GQD composites is converted to a quinone, which triggers the fluorescence quenching of PPy/GQD composites via a photoinduced electron transfer process. Hence, the concentration of EP can be effectively monitored by measuring the variation in the fluorescence signal of PPy/GQD composites. The quenched fluorescence intensity of PPy/GQDs was proportional to the concentration of EP (0.7–400 μM). We used our method to determine the concentration of EP in human serum samples and obtained satisfactory results.

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