Dual fluorescence of 2-(2'-hydroxyphenyl) benzoxazole derivatives via the branched decays from upper excited-state

2021 ◽  
Author(s):  
Zhe Tang ◽  
Haiyun Han ◽  
Junxia Ding ◽  
PanWang Zhou
Keyword(s):  
Excited State ◽  
Fluorescence Emission ◽  
Dual Fluorescence ◽  
Emission Channel

As a special fluorescence phenomenon, double fluorescence has been widely developed and applied in various fields. Nevertheless, most of the research of fluorescence emission channel stay in the first excited...

Excimer formation and dual fluorescence emission of a hydroxyquinoline based macrocyclic tripod: existence of intra and intermolecular π-stacking

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 108017-108027 ◽  
Author(s):  
Rohini Rohini ◽  
Minati Baral ◽  
B. K. Kanungo
Keyword(s):  
Excited State ◽  
Fluorescence Emission ◽  
Dual Fluorescence ◽  
Π Stacking ◽  
Excimer Formation ◽  
Ph Dependent

The excited state reaction of 1,4,7-tris-(5-methylene-8-hydroxyquinoline)-1,4,7-triazacyclononane was studied in solution. The intramolecular-π-stacked tripod shows pH-dependent eximer emission and dual fluorescence due to intermolecular π-stacking.

Influence of solvent polarity on the dual fluorescence of p-N,N-dimethylaminobenzonitrile: An AM1 theoretical study

1990 ◽  
Vol 55 (8) ◽  
pp. 1891-1895 ◽  
Author(s):  
Peter Ertl
Keyword(s):  
Excited State ◽  
Theoretical Study ◽  
Solvent Polarity ◽  
Semiempirical Method ◽  
Dual Fluorescence ◽  
Long Wavelength ◽  
Polar Media ◽  
Wavelength Emission ◽  
Ground State Geometry ◽  
Influence Of Solvent

Twisting of the NMe2 group in p-N,N-dimethylaminobenzonitrile (DMABN) was investigated using AM1 semiempirical method with configuration interaction. Effect of polar media was considered by placing + and - charge centers ("sparkles") at appropriate places opposite the molecule. Optimized ground state geometry of DMABN is slightly twisted with the lowest vertical excited state of 1B character. As the polarity of media increases and/or the - NMe2 group twists, the symmetric 1A excited state having considerable charge separation becomes energetically favorable. Anomalous long-wavelength emission of DMABN comes from this state.

Dual Fluorescence Emission by Irradiation of Single Optical Source for Fluorescein Sodium and 5-ALA Applications

2021 ◽  
Author(s):  
So Yoon Kwon ◽  
Ki-Cheol Yoon ◽  
Kwang Gi Kim
Keyword(s):  
Brain Tumors ◽  
Blood Vessels ◽  
Aminolevulinic Acid ◽  
Fluorescence Emission ◽  
Dual Band ◽  
Band Pass Filter ◽  
Fluorescein Sodium ◽  
Dual Fluorescence ◽  
Optical Source ◽  
Pass Filter

Abstract Most brain surgeries aim to completely resection a tumor. However, the arrangement of blood vessels around brain tumors is often complex. Moreover, the tumors and blood vessels have similar colors, making it difficult to identify the boundaries between them with the naked eye. Fluorescent staining is a method used to distinguish the borders between brain tumors and blood vessels. The fluorescent contrast agents commonly used to observe tumors are 5-aminolevulinic acid (5-ALA) and fluorescein sodium (FS), which have different surgical sensitivities, depending on the type of tumor. In this article, a dual band band-pass filter (BPF) with dual-wavelength emission for 5-ALA and FS is designed, and the dual-band BPF capable of inducing simultaneous fluorescence emission of FS and 5-ALA was investigated experimentally to improve accuracy, speed, and energy efficiency in clinical settings. The possibility of dual fluorescence emission with a single irradiation is proposed. The proposed fluorescent dual-band filter has the advantage of saving energy, reducing auxiliary manpower and unit costs, and reducing operating room space requirements by producing two fluorescence diagnostic effects using a single equipment.

Dual fluorescence and excited-state intramolecular proton transfer in jet-cooled 3,4-benzotropolone

1993 ◽  
Vol 215 (6) ◽  
pp. 641-648 ◽  
Author(s):  
Hiroshi Sekiya ◽  
Mariko Habu ◽  
Hiroki Ujita ◽  
Takeshi Tsuji ◽  
Akira Mori ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Dual Fluorescence

scholarly journals Synthesis of BODIPY-Amino Acids and the Potential Applications as Specific Dyes for the Cytoplasm of Langerhans β-Cells

2021 ◽  
Author(s):  
Jorge Aguilera ◽  
Víctor García-González ◽  
Manuel Alatorre-Meda ◽  
Eustolia Rodríguez-Velázquez ◽  
Ignacio Rivero
Keyword(s):  
Amino Acids ◽  
Photophysical Properties ◽  
Fluorescence Emission ◽  
Dual Fluorescence ◽  
Β Cells ◽  
Cell Cytoplasm ◽  
Specific Staining ◽  
Cell Staining ◽  
Potential Applications ◽  
The One

In this work, we explored the synthesis of 4,4-difluoro-4-bora-3a,4a-diazas-indacene (BODIPYs) bound to five different amino acids (BODIPY-FAA) (glycine, alanine, leucine, phenylalanine, and tyrosine) (amino group is kept protected with fluorophore Fmoc) and evaluated these conjugates in terms of (i) their photophysical properties and (ii) their potential application as cell staining agents of suspension and adherent cells at healthy and stress conditions. In general, all synthesized BODIPY-FAA (3a-3e) were found to emit fluorescence in the blue and green regions of the spectrum (depending on the solvent conditions). However, BODIPY-FTyr(trt) (3e) showed the best molar extinction coefficient (ε = 28,198 M-1 cm-1) and quantum yield (Φ = 0.17). Biologically speaking, all synthesized conjugates demonstrated a selective affinity for the cytoplasm of Langerhans β-cells employed as a model, being the BODIPY-FLeu conjugate the one displaying the highest observed intensity. As such, our results reveal the BODIPY-FAA as a novel attractive tool for the specific staining of the cell cytoplasm, demonstrating not only a dual fluorescence emission but also a sensing capability to recognize different cell states.

Controlling the Excited-State Relaxation for Tunable Single-Molecule Dual Fluorescence in Both the Solution and Film States

2022 ◽  
Author(s):  
Gang Wang ◽  
Nannan Ding ◽  
Hongxing Hao ◽  
Qingwei Jiang ◽  
Qianqian Feng ◽  
...  
Keyword(s):  
Excited State ◽  
Single Molecule ◽  
Dual Fluorescence

Realizing single-molecule dual fluorescence with facile tunability in both the solution and film states through manipulating the excited-state relaxation pathways is highly desirable but challenging. Herein, three synthesized fluorophores emit...

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