58464-25-8Relevant articles and documents
Viscosity sensitive semisquaraines based on 1, 1, 2-trimethyl-1H-benzo[e]indole: Photophysical properties, intramolecular charge transfer, solvatochromism, electrochemical and DFT study
Khopkar, Sushil,Jachak, Mahesh,Shankarling, Ganapati
, p. 123 - 135 (2019)
1, 1, 2-Trimethyl-1H-benzo[e]indole based D-π-A type semisquaraines denoted as, SSK 1–3 were synthesized to investigate their primary photophysical properties, intramolecular charge transfer, solvatochromism, electrochemical properties and viscosity dependent enhanced emission. These semisquaraines contain 1, 1, 2-trimethyl-1H-benzo[e]indole and squaryl ring as donor and acceptor respectively. These dyes displayed absorption between 437 and 444 nm and emission in the range of 469–493 nm. Stokes shift of the synthesized compounds were in the range of 32–54 nm. The SSK 1–3 exhibited intense yellow-orange colored solid state fluorescence (Fmax = 520–549 nm). These dyes exhibited intramolecular charge transfer characteristics which were confirmed from their oscillator strengths, transition dipole moments, ground and excited state dipole moments and generalized Mulliken-Hash analysis (GMH). Moreover, the positive emission solvatochromic behaviour (Δλem = 21–24 nm) of these dyes was quantitatively analyzed from different solvent polarity plots. More interestingly, these D-π-A type FMRs displayed viscosity sensitive emission enhancement (23 to 32 fold increase in fluorescence intensity) in 99% methanol:glycerol system at the visible region of electromagnetic spectrum (450–650 nm). The molecular structures of SSK 1–3 were correlated with photophysical properties using density functional theory (DFT) and theoretical absorption spectra in eight different solvents were obtained from time dependent density functional theory (TD-DFT).
A novel off-on fluorescent probe for sensitive imaging of mitochondria-specific nitroreductase activity in living tumor cells
Huang, Bo,Chen, Wen,Kuang, Yong-Qing,Liu, Wei,Liu, Xian-Jun,Tang, Li-Juan,Jiang, Jian-Hui
, p. 4383 - 4389 (2017)
Sensitive and selective detection and imaging of nitroreductase (NTR) in cancer cells is of great importance for better understanding their biological functions. Since there are a few fluorescent probes concerning NTR activity specifically located in mito
Large-sized benzo[: E] indolium salt single crystals with high optical nonlinearity
Shang, Shufang,Li, Ruian,Ping, Linjun,Luo, Wenzhen,Hai, Mingtan,Yang, Zhou,Wang, Dong,Cao, Hui,He, Wanli
, p. 5626 - 5632 (2019)
In this paper, a series of D-π-A type benzo[e]indolium salts with highly efficient nonlinear optical performance has been synthesized. Out of the three new benzo[e]indolium salts, (E)-2-(2-hydroxy-3-methoxystyryl)-1,1,3-trimethyl-1H-benzo[e]indol-3-ium iodide (HMTB-1) and (E)-2-(2-hydroxy-4-methoxystyryl)-1,1,3-trimethyl-1H-benzo[e]indol-3-ium iodide (HMTB-2) possess SHG properties, and their maximum powder second harmonic generation (SHG) efficiency is around 0.6 times that of DAST (4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate) at a non-resonant wavelength of λ = 1570 nm. Single crystals of the two noncentrosymmetric salts were successfully grown by using a slow cooling method, and we were able to obtain very large bulk single crystals, about 17 mm × 9 mm × 3 mm, of HMTB-2. X-ray crystallographic analysis indicated that both of the new salts belong to the monoclinic space group Cc (point group m, Z = 4). HMTB-1 forms a noncentrosymmetric phase with methanol through hydrogen bonding.
FRET-based ratiometric fluorescent detection of arginine in mitochondrion with a hybrid nanoprobe
Li, Yueyue,Ban, Yanan,Wang, Ruihui,Wang, Zheng,Li, Zhanxian,Fang, Chenjie,Yu, Mingming
, p. 443 - 446 (2020)
A ratiometric fluorescent hybrid nanoprobe CDs-1 for arginine (Arg), exhibiting high sensitivity (the limit of detection, LOD, being 6.5 × 10?8 mol/L) and excellent selectivity and anti-interference ability, was fabricated through fluorescence resonance energy transfer (FRET) and the electrostatic attraction between positively-charged hemicyanine molecules and negatively-charged carbon dots (CDs). Arg can be quantitatively detected in the concentration range from 6.0 × 10?5 mol/L to 2.7 × 10?4 mol/L. Further, due to its ability to target mitochondrion and low cytotoxicity, intracellular Arg was successfully tracked through ratiometric fluorescence imaging.
Bioorthogonal Ligation-Activated Fluorogenic FRET Dyads
Albitz, Evelin,Kern, Dóra,Kormos, Attila,Bojtár, Márton,T?r?k, Gy?rgy,Biró, Adrienn,Szatmári, ágnes,Németh, Krisztina,Kele, Péter
supporting information, (2021/12/30)
An energy transfer-based signal amplification relay concept enabling transmission of bioorthogonally activatable fluorogenicity of blue-excitable coumarins to yellow/red emitting cyanine frames is presented. Such relay mechanism resulted in improved cyani
Active inorganic sulfur species two-photon fluorescent probe as well as synthesis method and application thereof
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Paragraph 0051-0052; 0055, (2021/03/24)
The invention relates to an active inorganic sulfur species two-photon fluorescent probe, which takes 1-pyrenecarboxaldehyde-hemicyanine as a parent and has a structural general formula shown in the specification. The active inorganic sulfur species two-p
