66750-09-2Relevant academic research and scientific papers
Computational and experimental characterization of a fluorescent dye for detection of potassium ion concentration
Tanha, Matteus,Chakraborty, Subhasish K.,Gabris, Beth,Waggoner, Alan S.,Salama, Guy,Yaron, David
, p. 9837 - 9843 (2015/02/19)
The fluorescence of the SKC-513 ((E)-N-(9-(4-(1,4,7,10,13-pentaoxa-16-azacyclooctadecan-16-yl)phenyl)-6-(butyl(3-sulfopropyl)amino)-3H-xanthen-3-ylidene)-N-(3-sulfopropyl)butan-1-aminium) dye is shown experimentally to have high sensitivity to binding of
Aggregation induced emission in the rotatable molecules: The essential role of molecular interaction
Yu, Zhipeng,Duan, Yaya,Cheng, Longhuai,Han, Zhili,Zheng, Zheng,Zhou, Hongping,Wu, Jieying,Tian, Yupeng
, p. 16927 - 16932 (2012/11/07)
Aggregation-induced emission (AIE) compounds, dye2 and dye3, with a rotatable N-N single bond and aza-crown-ether, have been synthesized. The fluorescence intensities of both dyes are very weak in THF, while become extraordinarily strong in a mixture of H2O-THF (v/v 95%). They are increased by 88.9 and 70.7 times, respectively, indicating enhanced blue-green fluorescence emissions. The λem of these two compounds in different states has been well studied. Besides this, dye1 and dye2 were characterized by single crystal X-ray structural determination. The results show that molecular interactions are formed in the particles, which considerably restrict the intramolecular vibration and rotation. The Royal Society of Chemistry 2012.
Dyes that bear thiazolylazo groups as chromogenic chemosensors for metal cations
Abalos, Tatiana,Moragues, Maria,Royo, Santiago,Jimenez, Diego,Martinez-Manez, Ramon,Soto, Juan,Sancenon, Felix,Gil, Salvador,Cano, Joan
body text, p. 76 - 84 (2012/03/12)
A family of dyes (L1-L6) that contain a thiazolylazo group as signalling subunit and several macrocyclic cavities with different ring sizes and type and number of heteroatoms as binding sites has been synthesized and characterized. Solutions of L1-L6 in acetonitrile show broad and structureless absorption bands in the 554-577 nm range with typicalmolar absorption coefficients that range from 20000 to 32000 M -1 cm-1. A detailed protonation study was carried out with solutions of L1, L2 and L5 in acetonitrile. Addition of one equivalent of protons to L1 and L2 resulted in the development of a new band at 425 and 370 nm, respectively, which was ascribed to protonation in the aniline nitrogen. In contrast, protonation of L5 resulted in a bathochromic shift of 25 nm of the absorption band that was conceivable with protonation of one of the nitrogen atoms of the azo moiety. These results were in agreement with 1H NMR spectroscopic data. Theoretical studies on the model ligand L1 and on different possible protonation species were also performed by using density functional theory (DFT) quantum mechanical calculations. Colour modulations in solutions of L1-L6 in acetonitrile in the presence of the metal cations Fe3+, Ni2+, Zn2+, Cd2+, Pb2+ and Hg2+ have been studied. A selective chromogenic response of L4 in the presence of Pb2+ and L5 in the presence of Hg2+ was observed. To get a better insight into the chromophoric nature in the presence of metal cations, the interaction of Hg2+ with the model compound L1 in two different coordination modes was studied theoretically by using density functional theory (DFT) quantum mechanical calculations.
Aza crown ether appended hetarylazo dye - Single molecular dual analyte chemosensor for Hg2+ and Pb2+
Kaur, Paramjit,Sareen, Divya,Singh, Kamaljit
supporting information; experimental part, p. 8767 - 8769 (2012/09/22)
A hetarylazo dye appended with an aza crown ether detects and discriminates Hg2+ and Pb2+ from each other by immediate visual observation, significant from an 'on-site' evaluation point of view. It is accompanied by absorption based changes and is convincingly established from 1H NMR, TD-DFT and electrochemical studies. The Royal Society of Chemistry 2012.
Synthesis, enhanced spectroscopic characterization and electrochemical grafting of N-(4-aminophenyl)aza-18-crown-6: Application of DEPT, HETCOR, HMBC-NMR and X-ray photoelectron spectroscopy
Deveci, Pervin,Taner, Bilge,üstünda?, Zafer,?zcan, Emine,Solak, Ali Osman,Kili?, Zeynel
experimental part, p. 162 - 168 (2011/01/06)
This work describes the synthesis, characterization and electrochemical grafting of N-(4-aminophenyl)aza-18-crown-6 (4APA18C6). The key step in the synthesis is the reaction of N-phenylaza-18-crown-6 (PA18C6) with sodium nitrite. The compound, N-(4-nitros
Ligand Structure and Complexation, L. Ion-selective Crown Ether Dyes
Dix, Johannes Peter,Voegtle, Fritz
, p. 457 - 470 (2007/10/02)
New dyes with an ion-selective crown ether system, the complexation of which with cations influences the ground and excited states of the chromophore to a different extent, have been synthesized.Different types of alkali/alkaline earth metal ions cause different colour changes, significant effects being normally observed with cations fitting selectively into the crown ether units with cromophores of azo dyes (1-3, 8a, b, 22, 24), naphthol blue (10), phenol blue (11), stilbene dyes (14a, b), (mero)cyanines (16, 17a, b), and of Koenig's salt (19, 20).Chromophores bound to open chain oligoethylene glycol ethers are also described.The remarkable changes of light absorption in the course of complexation of some of the dyes are discussed in terms of donor participation of the auxochrome or antiauxochrome.
