A fullerene-rhodamine B photosensitizer with pH-activated visible-light absorbance/fluorescence/photodynamic therapy

2018 ◽  
Vol 6 (18) ◽  
pp. 2778-2784 ◽  
Author(s):  
Qianyun Tang ◽  
Wanyue Xiao ◽  
Jiewei Li ◽  
Dapeng Chen ◽  
Yewei Zhang ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Excited State ◽  
Visible Light ◽  
Rhodamine B ◽  
Heavy Atom ◽  
Triplet Excited State ◽  
Turn On ◽  
State Generation ◽  
Fluorescence Turn On ◽  
Light Absorbance

A heavy-atom-free photosensitizer (C60-RB) with pH-activable visible-light absorbance enhancement, fluorescence turn-on and triplet excited state generation was designed for tumor bioimaging and photodynamic therapy.

scholarly journals Control of triplet state generation in heavy atom-free BODIPY–anthracene dyads by media polarity and structural factors

2018 ◽  
Vol 20 (12) ◽  
pp. 8016-8031 ◽  
Author(s):  
Mikhail A. Filatov ◽  
Safakath Karuthedath ◽  
Pavel M. Polestshuk ◽  
Susan Callaghan ◽  
Keith J. Flanagan ◽  
...  
Keyword(s):  
Excited State ◽  
Triplet State ◽  
State Formation ◽  
Heavy Atom ◽  
Molecular Rotation ◽  
Structural Factors ◽  
Triplet Excited State ◽  
State Generation

Heavy atom-free BODIPY–anthracene dyads show triplet excited state formation via PeT, controlled by molecular rotation and environmental polarity.

scholarly journals Broadband Visible Light-Absorbing [70]Fullerene-BODIPY-Triphenylamine Triad: Synthesis and Application as Heavy Atom-Free Organic Triplet Photosensitizer for Photooxidation

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1243
Author(s):  
San-E Zhu ◽  
Jian-Hui Zhang ◽  
Yu Gong ◽  
Li-Feng Dou ◽  
Li-Hua Mao ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Chemical Sensor ◽  
Heavy Atom ◽  
Visible Region ◽  
Intersystem Crossing ◽  
Triplet Excited State ◽  
Efficient Energy Transfer ◽  
Uv Visible ◽  
The Individual

A broadband visible light-absorbing [70]fullerene-BODIPY-triphenylamine triad (C70-B-T) has been synthesized and applied as a heavy atom-free organic triplet photosensitizer for photooxidation. By attaching two triphenylmethyl amine units (TPAs) to the π-core of BODIPY via ethynyl linkers, the absorption range of the antenna is extended to 700 nm with a peak at 600 nm. Thus, the absorption spectrum of C70-B-T almost covers the entire UV–visible region (270–700 nm). The photophysical processes are investigated by means of steady-state and transient spectroscopies. Upon photoexcitation at 339 nm, an efficient energy transfer (ET) from TPA to BODIPY occurs both in C70-B-T and B-T, resulting in the appearance of the BODIPY emission at 664 nm. Direct or indirect (via ET) excitation of the BODIPY-part of C70-B-T is followed by photoinduced ET from the antenna to C70, thus the singlet excited state of C70 (1C70*) is populated. Subsequently, the triplet excited state of C70 (3C70*) is produced via the intrinsic intersystem crossing of C70. The photooxidation ability of C70-B-T was studied using 1,5-dihydroxy naphthalene (DHN) as a chemical sensor. The photooxidation efficiency of C70-B-T is higher than that of the individual components of C70-1 and B-T, and even higher than that of methylene blue (MB). The photooxidation rate constant of C70-B-T is 1.47 and 1.51 times as that of C70-1 and MB, respectively. The results indicate that the C70-antenna systems can be used as another structure motif for a heavy atom-free organic triplet photosensitizer.

Investigation of the triplet excited state and application of cationic meso-tetra(cisplatin)porphyrins in antimicrobial photodynamic therapy

2021 ◽  
pp. 102459
Author(s):  
Dariane Clerici Jornada ◽  
Rafael de Queiroz Garcia ◽  
Carolina Hahn da Silveira ◽  
Lino Misoguti ◽  
Cleber Renato Mendonça ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Excited State ◽  
Antimicrobial Photodynamic Therapy ◽  
Triplet Excited State

A new visible-light-excitable ICT-CHEF-mediated fluorescence ‘turn-on’ probe for the selective detection of Cd2+ in a mixed aqueous system with live-cell imaging

2015 ◽  
Vol 44 (12) ◽  
pp. 5763-5770 ◽  
Author(s):  
Shyamaprosad Goswami ◽  
Krishnendu Aich ◽  
Sangita Das ◽  
Chitrangada Das Mukhopadhyay ◽  
Deblina Sarkar ◽  
...  
Keyword(s):  
Visible Light ◽  
Live Cell Imaging ◽  
Cell Imaging ◽  
Aqueous System ◽  
Live Cell ◽  
Selective Detection ◽  
Turn On ◽  
Fluorescence Turn On

A new quinoline based sensor was developed and applied for the selective detection of Cd2+ both in vitro and in vivo.

Aromatic C–H Activation in the Triplet Excited State of Cyclometalated Platinum(II) Complexes Using Visible Light

2016 ◽  
Vol 138 (16) ◽  
pp. 5276-5282 ◽  
Author(s):  
Fabio Juliá ◽  
Pablo González-Herrero
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Triplet Excited State

Fluorescence turn-on detection of cysteine over homocysteine and glutathione based on “ESIPT” and “AIE”

2015 ◽  
Vol 7 (12) ◽  
pp. 5028-5033 ◽  
Author(s):  
Hualong Liu ◽  
Xiaoyan Wang ◽  
Yu Xiang ◽  
Aijun Tong
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Aggregation Induced Emission ◽  
Emission Properties ◽  
Turn On ◽  
Fluorescence Turn On

A turn-on detection of cysteine (Cys) based on excited-state intramolecular proton transfer and aggregation-induced emission properties of a salicylaldehyde azine derivative has been established.

Excited state proton transfer (ESIPT) based molecular probe to sense F− and CN− anions through a fluorescence “turn-on” response

2018 ◽  
Vol 42 (14) ◽  
pp. 11746-11754 ◽  
Author(s):  
Rashid Ali ◽  
Ramesh C. Gupta ◽  
Sushil K. Dwivedi ◽  
Arvind Misra
Keyword(s):  
Schiff Base ◽  
Excited State ◽  
Proton Transfer ◽  
Molecular Probe ◽  
Anion Sensing ◽  
Turn On ◽  
Excited State Proton Transfer ◽  
Fluorescence Turn On

Dual anion sensing through an efficient thiazole based phenolic Schiff base containing molecular probe by means of fluorescence “turn-on” response.

scholarly journals A rhodamine-based chemosensor with diphenylselenium for highly selective fluorescence turn-on detection of Hg2+in vitro and in vivo

RSC Advances ◽  
2017 ◽  
Vol 7 (35) ◽  
pp. 21733-21739 ◽  
Author(s):  
Parthiban Venkatesan ◽  
Natesan Thirumalivasan ◽  
Shu-Pao Wu
Keyword(s):  
Rhodamine B ◽  
Turn On ◽  
Fluorescence Turn On

A rhodamine-B based chemosensor with diphenylselenium, RhoSe, has been developed for highly selective fluorescent turn-on detection of Hg2+.

scholarly journals Single-atom replacement as a general approach towards visible-light/near-infrared heavy-atom-free photosensitizers for photodynamic therapy

2020 ◽  
Vol 11 (26) ◽  
pp. 6701-6708 ◽  
Author(s):  
Juan Tang ◽  
Lushun Wang ◽  
Axel Loredo ◽  
Carson Cole ◽  
Han Xiao
Keyword(s):  
Photodynamic Therapy ◽  
Oxygen Atom ◽  
Visible Light ◽  
Near Infrared ◽  
Heavy Atom ◽  
Single Atom ◽  
General Strategy ◽  
Nir Light ◽  
Fluorescent Molecules

Thio-based photosensitizer: a general strategy for preparing visible/NIR light absorbing heavy-atom-free photosensitizers was developed by performing a simple sulfur-for-oxygen atom substitution within existing fluorescent molecules.

Extending the scope of the carbonyl facilitated triplet excited state towards visible light excitation

2018 ◽  
Vol 20 (28) ◽  
pp. 19120-19128 ◽  
Author(s):  
Shinaj K. Rajagopal ◽  
Nagaraj K. ◽  
Somadrita Deb ◽  
Vinayak Bhat ◽  
Devika Sasikumar ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Triplet State ◽  
Lewis Acid ◽  
Triplet Excited State ◽  
Light Excitation ◽  
Acid Catalyzed

A series of extended π-conjugated benzophenone analogs was synthesized through a facile Lewis-acid catalyzed Friedel–Crafts reaction in order to exploit the integral triplet state properties of benzophenone.

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