Aggregation induced emission controlled by a temperature-sensitive organic–inorganic hybrid polymer with a particular LCST

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86012-86018 ◽  
Author(s):  
Mengmeng Li ◽  
Xiaoyan Song ◽  
Tingbin Zhang ◽  
Lintao Zeng ◽  
Jinfeng Xing
Keyword(s):  
Temperature Change ◽  
Fluorescence Intensity ◽  
Intensity Change ◽  
Temperature Sensitive ◽  
Hybrid Polymer ◽  
Inorganic Hybrid ◽  
Aggregation Induced Emission ◽  
Fluorescence Intensity Change

The fluorescence intensity change of TPE encapsulated in POSS–PNIPAM with a particular LCST (37.5 °C) with the temperature change.

Sex difference in cardiomyocyte function in normal and metallothionein transgenic mice: the effect of diabetes mellitus

2006 ◽  
Vol 100 (5) ◽  
pp. 1638-1646 ◽  
Author(s):  
Asli F. Ceylan-Isik ◽  
Karissa H. LaCour ◽  
Jun Ren
Keyword(s):  
Transgenic Mice ◽  
Sex Difference ◽  
Fluorescence Intensity ◽  
Contractile Function ◽  
Intensity Change ◽  
Maximal Velocity ◽  
Akt Phosphorylation ◽  
Fura 2 ◽  
Factor C ◽  
Fluorescence Intensity Change

Evidence suggests a sex difference in intrinsic physiological and diabetic myocardial contractile function related to antioxidant properties of female ovarian hormones. This study was designed to examine the effect of cardiac overexpression of antioxidant metallothionein on intrinsic and diabetic cardiomyocyte function. Weight-matched wild-type (FVB) and metallothionein transgenic mice of both sexes were made diabetic with streptozotocin (220 mg/kg). Contractile and intracellular Ca2+ properties were evaluated including peak shortening (PS), time to PS, time to 90% relengthening (TR90), maximal velocity of shortening or relengthening (±d L/d t), fura-2 fluorescence intensity change, and Ca2+ decay rate. Akt and transcription factor c-Jun levels were evaluated by Western blot. Myocytes from female FVB mice exhibited lower PS, ±d L/d t, and fura-2 fluorescence intensity change, prolonged time to PS, TR90, and Ca2+ decay compared with male FVB mice. Interestingly, this sex difference was not present in metallothionein mice. Diabetes depressed PS, ±d L/d t and caffeine-induced Ca2+ release, as well as prolonged TR90 and Ca2+ decay in male FVB mice, whereas it only reduced PS in female FVB mice. These diabetic dysfunctions were nullified by metallothionein in both sexes. Females displayed elevated Akt phosphorylation and reduced c-Jun phosphorylation. Diabetes dampened Akt phosphorylation in male FVB mice and enhanced c-Jun in both sexes. Diabetes-induced alterations in Akt phosphorylation and c-Jun were abolished by metallothionein. The sex difference in Akt phosphorylation but not c-Jun levels was reversed by metallothionein. These data indicate that antioxidant capacity plays an important role in sex differences in both intrinsic and diabetic cardiomyocyte contractile properties possibly related to phosphorylation of Akt and c-Jun.

scholarly journals Topical Gadobutrol Application Causes Fluorescence Intensity Change in RFP-expressing Tumor-Bearing Mice

2021 ◽  
Vol 7 (2) ◽  
pp. 020301
Author(s):  
Natalia Kazachkina ◽  
Victoria Zherdeva ◽  
Asiya Saydasheva ◽  
Irina Meerovich ◽  
Valery Tuchin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Fluorescence Intensity ◽  
Fluorescent Protein ◽  
Intensity Change ◽  
Planar Imaging ◽  
Optical Clearing ◽  
Tissue Fluorescence ◽  
Penetration Depths ◽  
Fluorescence Intensity Change

Optical clearing (OC) allows one to observe tissue structures and metabolic processes occurring in opaque tissues at the depths significantly exceeding the depths that can be reached without OC. Recently, we have shown that gadobutrol is a promising agent for OC of tissues in vivo. The aim of this study was to investigate the effect of time-dependence optical clearing caused by gadobutrol on intensity of fluorescent protein constitutively expressed in subcutaneous tumors in vivo. The measurements were performed in nu/nu mice bearing HEp-2 tumors expressing the red fluorescent protein TagRFP. Gadobutrol was used directly at concentrations 1.0 M aqueous solution or as a 0.7 M aqueous solution containing 5% dimethyl sulfoxide (DMSO). Gadobutrol was applied topically onto the skin above the tumors for 15 min. Tissue fluorescence was measured by using in vivo planar imaging technique. It was shown that the fluorescence intensity of tumors increased by 1.1–1.5 times in different animals under the influence of gadobutrol. The increase in intensity was more pronounced in the case of 0.7 M gadobutrol supplemented with DMSO. Apparently, the observed difference of penetration depths was due to the presence of DMSO in 0.7 M gadobutrol mixture.

An Efficient Ag+-Selective Fluorescent Chemosensor Derived from Tribenzotriquinacene

Synthesis ◽  
2018 ◽  
Vol 50 (07) ◽  
pp. 1457-1461 ◽  
Author(s):  
Xiao-Ping Cao ◽  
Hak-Fun Chow ◽  
Dietmar Kuck ◽  
Zhi-Min Li ◽  
Da Hu ◽  
...  
Keyword(s):  
Fluorescence Intensity ◽  
Single Step ◽  
Fluorescent Chemosensor ◽  
Intensity Change ◽  
Naked Eye ◽  
Silver Salts ◽  
Fluorescent Quenching ◽  
Molecular Framework ◽  
Fluorescence Intensity Change

A new C 3v -symmetrical tribenzotriquinacene (TBTQ) derivative bearing six 8-quinolinyloxymethyl units at the rim of the bowl-shaped molecular framework is synthesized in a single-step by six-fold etherification of the corresponding hexakis(chloromethyl)-TBTQ precursor with 8-hydroxyquinoline. The resulting compound acts as a fluorescence chemosensor, producing a ‘turn-off’ fluorescent quenching response in the presence of Ag+ ions, and is highly selective toward Ag+ over other cations, such as Al3+, Ca2+, Cd2+, Co2+, Cr3+, Cu2+, Fe3+, Ga3+, Hg2+, In3+, K+, Mg2+, Mn2+, Na+, Ni2+, Pb2+, Pd2+, and Zn2+. The fluorescence intensity change of the chemosensor solution can be clearly observed by the naked eye upon addition of silver salts.

scholarly journals Thermo-mechanical and photo-luminescence properties of micro-actuators made of liquid crystal elastomers with cyano-oligo(p-phenylene vinylene) crosslinking bridges

2019 ◽  
Vol 3 (11) ◽  
pp. 2499-2506 ◽  
Author(s):  
Bin Ni ◽  
Hui Chen ◽  
Mengxue Zhang ◽  
Patrick Keller ◽  
Michael Tatoulian ◽  
...  
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Fluorescence Intensity ◽  
Photo Luminescence ◽  
Intensity Change ◽  
Phenylene Vinylene ◽  
Liquid Crystal Elastomer ◽  
Micro Actuators ◽  
Liquid Crystal Elastomers ◽  
Fluorescence Intensity Change

Liquid crystal elastomer micropillars containing β-cyano-OPV crosslinkers contract reversibly at nematic–isotropic (N–I) phase transition and undergo fluorescence intensity change. This luminescent variation is mainly caused by N–I phase change.

Reversible Fluorescence Intensity Change of a Diarylethene

1998 ◽  
Vol 27 (11) ◽  
pp. 1123-1124 ◽  
Author(s):  
Michinori Takeshita ◽  
Masahiro Irie
Keyword(s):  
Fluorescence Intensity ◽  
Intensity Change ◽  
Fluorescence Intensity Change

The use of the organic–inorganic hybrid polymer Al(OH) 3 –polyacrylamide to flocculate particles in the cyanide tailing suspensions

2016 ◽  
Vol 89 ◽  
pp. 108-117 ◽  
Author(s):  
Ya Liu ◽  
Cuicui Lv ◽  
Jian Ding ◽  
Peng Qian ◽  
Xiaomeng Zhang ◽  
...  
Keyword(s):  
Hybrid Polymer ◽  
Inorganic Hybrid

Organic/Inorganic Hybrid Silicate Materials for Optical Applications; Highly Fluorinated Hybrid Glasses Doped with (Erbium-ions/CdSe nanoparticles) for Laser Amplifier Material

2004 ◽  
Vol 846 ◽  
Author(s):  
Kyung M. Choi ◽  
John A. Rogers
Keyword(s):  
Fluorescence Intensity ◽  
Nano Particles ◽  
Laser Amplifier ◽  
Inorganic Hybrid ◽  
New Family ◽  
Erbium Ions ◽  
Optical Applications ◽  
Hybrid Silicate ◽  
Chemical Strategy ◽  
Silicate Materials

A new family of organic/inorganic hybrid silicate materials, bridged polysilsesquioxanes, was designed and synthesized through a molecular-level mixing technique. Since hybrid materials in the molecular-composite level, whose domain sizes are in the nanometer-scale, and whose constituents often lose individual identities and thus create new properties, we obtained a set of improved properties from those organically modified glasses. By modifying the Si-O-Si polymeric network, in this study, we produced controllable, porous hybrid glasses for facile and uniform doping of various ions, metals or semiconductor particles. By taking advantage of void volume created in those molecularly modified silicate systems, novel optical materials with designed properties can thus be achieved. Via a chemical strategy, we designed hexylene- or fluoroalkylene-bridged hybrid glasses doped with both Er+3 ions and CdSe nano-particles for the development of new laser amplifier materials. In photoluminescence experiments, a significant enhancement in fluorescence intensity at 1540 nm has been obtained from the fluoroalkylene-bridged glass. The presence of CdSe nano-particles, by virtue of their low phonon energy, also appears to significantly influence the nature of the surrounding environment of Er+3 ions in those modified silicate systems, resulting in the increased fluorescence intensity.

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