26559-67-1Relevant articles and documents
Fructose recognition using new “Off-On” fluorescent chemical probes based on boronate-tagged 1,8-naphthalimide
Seraj, Sanaz,Rouhani, Shohre,Faridbod, Farnoush
, p. 19872 - 19880 (2018)
It has recently been found that hereditary fructose intolerance (HFI) alongside the blood glucose level can be an important indicator in diabetes or some metabolic disorders. Over time, fluorescent organic molecules have grown in popularity for selective recognitions of a wide range of analytes. This work introduces new synthesized molecules based on boronate-tagged 1,8-naphthalimide with a planar structure and high fusion loops for rapid optical detection of fructose. Boronic acids which form five-membered boronate esters with diols have become increasingly popular in the synthesis of small chemical receptors. Two new water-soluble fluorescent selectophores have been successfully synthesized and their selectivity has been studied in sensing saccharides. The synthesized selectophores indicated selectivity toward fructose compared to other tested saccharides within the range of 0.16 to 50 mM at the physiological pH 7.4. The designed fluorescent probes were used to measure the percentage of fructose in fructose corn syrup. The results revealed that the (2-(((2-((7-oxo-7H-benzo[d,e]benzo[4,5]imidazo[2,1-a]isoquinolin-3-yl)amino)ethyl)amino)methyl)phenyl)boronic acid (NONB) probe was able to determine the concentration of fructose satisfactorily, suggesting that this probe can potentially be applied for quantitative detection of fructose in real samples.
Positional isomeric chemosensors: Fluorescent and colorimetric cyanide detection based on Si-O cleavage
Chen, Yayun,Zhao, Luting,Fu, Hanghai,Rao, Caihui,Li, Zheyao,Liu, Chuanxiang
, p. 8734 - 8738 (2017)
Highly selective and sensitive fluorescent and colorimetric cis/trans isomers 3 were rationally designed and investigated for the fast detection and visualization of cyanide ions (TBACN and NaCN) via CN-promoted Si-O cleavage in aqueous solution and in the solid state. The CN-promoted desilylation induced significant variations of the optical signals of cis- and trans-3, which mainly depend upon the steric arrangement of the Si-O group in relation to the π-extended system.
The synthesis and study of fluorescent PAMAM-based dendritic molecules
El-Betany, Alaa M.M.,Vachova, Lenka,Bezzu, C. Grazia,Pope, Simon J.A.,McKeown, Neil B.
, p. 8439 - 8445 (2013)
New water soluble and fluorescent PAMAM-based dendritic molecules based on the naphthalimide derivative 7H-benz[de]benzimidazo[2,1-a]isoquinoline-7-one as the fluorescent unit, have been prepared and their photophysical properties studied in aqueous solution over a wide pH range. The dendrons are all strongly fluorescent through an intramolecular charge transfer (ICT) excited state, but this can be modulated by photoinduced electron transfer (PeT) processes, which increases with higher PAMAM dendron generation.
Naphthalene Benzimidazole Based Neutral Ir(III) Emitters for Deep Red Organic Light-Emitting Diodes
Kim, Hyung Suk,Kumar, Ajay,Lee, Min Hyung,Lee, Woochan,Rajakannu, Palanisamy,Yoo, Seunghyup
supporting information, p. 12461 - 12470 (2020/10/05)
Rigid naphthalene benzimidazole (NBI) based ligands (L1 and L2) are synthesized and utilized to make deep red phosphorescent cyclometalated iridium(III) complexes ([Ir(NBI)2(PyPzCF3)] (1) and [Ir(DPANBI)2(PyPzCF3)] (2)). Complexes 1 and 2 are prepared from the reaction of L1/L2 with the aid of ancillary ligands (PyPzCF3, 2-(3-(trifluoromethyl)-1H-pyrazol-5-yl)pyridine) in a two step method. The complexes are characterized by analytical and spectroscopic methods, as well as X-ray diffraction for 1. These complexes show a strong emission in the range of 635-700 nm that extends up to the near-infrared region (800 nm). The introduction of the diphenylamino (DPA) donor group on the naphthalene unit leads to a further red-shift in the emission. The complexes exhibit radiative quantum efficiency (φPL) of 0.27-0.29 in poly(methylmethacrylate) film and relatively short phosphorescence decay lifetimes (τ = 1.1-3.5 μs). The structural, electronic, and optical properties are investigated with the support of density functional theory (DFT) and time-dependent-DFT calculations. The calculation results indicate that the lowest-lying triplet (T1) excited state of 1 has a mixed metal-to-ligand charge transfer (3MLCT) and ligand-centered (3LC) character, while 2 shows a dominant 3LC character. Deep red-emitting organic light-emitting diodes fabricated using 1 as a dopant display a maximum external quantum efficiency of 10.9% with the CIE color coordinates of (0.690, 0.294), with an emission centered at 644 and 700 nm. Similarly, the emitter 2 also shows a maximum external quantum efficiency of 6.9% with emissions at 657 and 722 nm.
