Characterization of Photoinduced Isomerization and Intersystem Crossing of the Cyanine Dye Cy3

2007 ◽  
Vol 111 (9) ◽  
pp. 1593-1597 ◽  
Author(s):  
Ke Jia ◽  
Yan Wan ◽  
Andong Xia ◽  
Shayu Li ◽  
Fangbin Gong ◽  
...  
Keyword(s):  
Cyanine Dye ◽  
Intersystem Crossing ◽  
Photoinduced Isomerization

Structure characterization of new cyanine dye Langmuir-Blodgett multilayers by polarized UV-vis spectroscopy

2006 ◽  
Author(s):  
Shihong Ma ◽  
Feng Gao ◽  
Hao Zeng ◽  
Chuang Wang ◽  
Wencheng Wang ◽  
...  
Keyword(s):  
Structure Characterization ◽  
Cyanine Dye ◽  
Langmuir Blodgett ◽  
Vis Spectroscopy

Characterization of a novel crown ether-bearing near-infrared heptamethine cyanine dye. A study of fluorescence quenching by lithium

2002 ◽  
Vol 72 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Leila Tarazi ◽  
Hoseob Choi ◽  
J. Christian Mason ◽  
John Sowell ◽  
Lucjan Strekowski ◽  
...  
Keyword(s):  
Crown Ether ◽  
Fluorescence Quenching ◽  
Near Infrared ◽  
Cyanine Dye

scholarly journals Characterization of the Apoptotic Response Induced by the Cyanine Dye D112: A Potentially Selective Anti-Cancer Compound

PLoS ONE ◽  
2015 ◽  
Vol 10 (4) ◽  
pp. e0125381 ◽  
Author(s):  
Ning Yang ◽  
Paul Gilman ◽  
Razmik Mirzayans ◽  
Xuejun Sun ◽  
Nicolas Touret ◽  
...  
Keyword(s):  
Cyanine Dye ◽  
Apoptotic Response ◽  
Anti Cancer

scholarly journals Photoacoustic in vivo 3D imaging of tumor using a highly tumor-targeting probe under high-threshold conditions

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hisatsugu Yamada ◽  
Natsuki Matsumoto ◽  
Takanori Komaki ◽  
Hiroaki Konishi ◽  
Yu Kimura ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Tumor Targeting ◽  
3D Imaging ◽  
Near Infrared ◽  
Three Dimensional ◽  
Cyanine Dye ◽  
High Threshold ◽  
Threshold Conditions

Abstract Three-dimensional (3D) representation of a tumor with respect to its size, shape, location, and boundaries is still a challenge in photoacoustic (PA) imaging using artificial contrast agents as probes. We carried out PA imaging of tumors in mice using 800RS-PMPC, which was obtained by coupling of 800RS, a near-infrared cyanine dye, with PMPC, a highly selective tumor-targeting methacrylate polymer having phosphorylcholine side chains, as a probe. The conjugate 800RS-PMPC forms compact nanoparticles (dDLS = 14.3 nm), retains the biocompatibility of the parent polymer (PMPC) and exhibits unprecedented PA performance. When applied to mice bearing a 6 × 3 × 3 mm3 tumor buried 6 mm beneath the skin, the probe 800RS-PMPC selectively accumulates in the tumor and emits PA signals that are strong enough to be unambiguously distinguished from noise signals of endogenous blood/hemoglobin. The PA image thus obtained under high-threshold conditions allows 3D characterization of the tumor in terms of its size, shape, location, and boundaries.

scholarly journals Photolysis of 5-Azido-3-Phenylisoxazole at Cryogenic Temperature: Formation and Direct Detection of a Nitrosoalkene

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 543 ◽  
Author(s):  
Upasana Banerjee ◽  
William L. Karney ◽  
Bruce S. Ault ◽  
Anna D. Gudmundsdottir
Keyword(s):  
Density Functional ◽  
Direct Detection ◽  
Intersystem Crossing ◽  
Functional Theory ◽  
Concerted Mechanism ◽  
Complete Active Space ◽  
Organic Azides ◽  
Consistent Field ◽  
Self Consistent Field

To enhance the versatility of organic azides in organic synthesis, a better understanding of their photochemistry is required. Herein, the photoreactivity of azidoisoxazole 1 was characterized in cryogenic matrices with IR and UV-Vis absorption spectroscopy. The irradiation (λ = 254 nm) of azidoisoxazole 1 in an argon matrix at 13 K and in glassy 2-methyltetrahydrofuran (mTHF) at 77 K yielded nitrosoalkene 3. Density functional theory (DFT) and complete active space self-consistent field (CASSCF) calculations were used to aid the characterization of nitrosoalkene 3 and to support the proposed mechanism for its formation. It is likely that nitrosoalkene 3 is formed from the singlet excited state of azidoisoxazole 1 via a concerted mechanism or from cleavage of an intermediate singlet nitrene that does not undergo efficient intersystem crossing to its triplet configuration.

Sign in / Sign up

Export Citation Format

Share Document