550348-57-7Relevant academic research and scientific papers
In Situ Photoconversion of Multicolor Luminescence and Pure White Light Emission Based on Carbon Dot-Supported Supramolecular Assembly
Wu, Huang,Chen, Yong,Dai, Xianyin,Li, Peiyu,Stoddart, J. Fraser,Liu, Yu
supporting information, p. 6583 - 6591 (2019/05/06)
Constructing multicolor photoluminescence materials that allow for the integration of suitable external stimuli in order to control luminescence color conversions is a challenging objective. Multicolor luminescent output that is regulated in an in situ photo-controlled manner is not a common phenomenon. Herein, a photoluminescent supramolecular assembly, prepared in two stages, is described that displays in situ photo-tuning broad-spectrum output. Benefiting from the reversible photo-switched constitutional interconversion of diarylethenes, the fluorescence of a guest molecule, styrylpyridinium-modified diarylethene, can be switched on/off by alternating ultraviolet and visible light irradiation. Upon complexation of this guest with a host, cucurbit[8]uril, the fluorescence intensity of the resulting binary supramolecular nanofiber shows a drastic enhancement when compared with that of the free guest, which can also be quenched and recovered reversibly by light irradiation. Significantly, such cationic supramolecular nanofibers also interact with anionic carbon dots to form broad-spectrum output ternary supramolecular assemblies, the fluorescence of which can be changed efficiently from yellow to blue in an in situ photo-controlled manner. Pure white light emission can be realized expediently in the luminescence color-conversion process. The use of light as an external stimulus to regulate fluorescent color conversion provides us with an opportunity to design and construct more advanced anti-counterfeiting materials as well as visual display instruments.
Asymmetric octafluorocyclopentene compound with continuous selectivity for Hg2+ and Cys, preparation method and application thereof
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, (2017/07/20)
The invention discloses [1-[2-methyl-3-benzothiophene], 2-(2-methyl-5-(4-phenyl)-(2-benzoylquinoline-8-benzothiazolyl)-3-thienyl)] octafluorocyclopentene, a preparation method and an application thereof. The preparation method comprises the following steps: by taking benzothiophene as a raw material, replacing by methyl iodide and bromizing and then reacting with octafluorocyclopentene, thereby generating mono-substituted octafluorocyclopentene; by taking 2-thiotolene as a raw material, bromizing and causing n-butyllithium to react with tributyl borate; connecting aldehyde-terminated benzene with thiophene ring through Stuzki coupling; protecting by adopting ethylene glycol and then reacting with the mono-substituted octafluorocyclopentene; reducing into alcoholic hydroxyl group and becoming methylene-containing bromine; reacting with 8-hydroxyquinoline-2-aldehyde group; and finally reacting with 2-amino thiophenol, thereby acquiring a target compound. The compound prepared according to the invention can be used for continuously detecting specific ions and amino acid and has an excellent selectivity.
Photochromic double (N-ethyl -1,8-naphthalene imide) amine-benzo thiophene mixed linkage type dithienylethene compounds, and synthetic method and application
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, (2017/03/23)
The invention discloses a photochromic bis(N-ethyl-1,8-naphthalimide)amine-benzothiophene hybrid type perfluorocyclopentene compound, and a synthetic method and application thereof. The photochromic material keeps good photochromic performance in solutions, and has extremely good chemical and heat stability, extremely good sensitivity and other superior performances when being in a ring-opened state (a colorless state) and a ring-closed state (a color appearance state), is applicable to fluorescence detection, fluorescence-controlled switches, high-density holographic optical storage, dual-control fluorescence molecule switches, pH chemical sensors, metal ion chemical sensors and the like, and is wide in application prospect.
A multi-addressable molecular switch based on a novel diarylethene with an imidazo [4,5-f] [1,10] phenanthroline unit
Ren, Panpan,Wang, Renjie,Pu, Shouzhi,Liu, Gang,Fan, Congbin
, p. 183 - 190 (2014/03/21)
A novel unsymmetrical diarylethene with an imidazo [4,5-f] [1,10] phenanthroline unit has been synthesized, and its properties including photochromism and fluorescence have been investigated. It showed favorable photochromism and functioned as notable fluorescence switches by photoirradiation in both solution and a poly (methylmethacrylate) film. Moreover, the interaction between the phenanthroline unit of its closed-ring isomer with trifluoroacetic acid caused a notable change in its absorption, accompanied by an evident color change from magenta to slateblue. Its fluorescence could be modulated by trifluoroacetic acid and triethylamine. By adding enough amount of trifluoroacetic acid in chloroform, its emission peak hypochromatic shifted from 501 nm to 456 nm, and the intensity increased significantly with a concomitant change of color from bright cyan to bright blue. However, its emission intensity decreased notably by 95% with a fluorescence color change from bright cyan to dark gray by the addition of triethylamine. Copyright
The effect of the formyl group position upon asymmetric isomeric diarylethenes bearing a naphthalene moiety
Wang, Renjie,Pu, Shouzhi,Liu, Gang,Cui, Shiqiang
, p. 1018 - 1026 (2012/08/28)
Three new isomeric asymmetric diarylethenes with a naphthyl moiety and a formyl group at the para, meta or ortho position of the terminal benzene ring were synthesized. Their photochromism, fluorescent-switch, and electrochemical properties were investiga
Photochromic polymers bearing various diarylethene chromophores as the pendant: Synthesis, optical properties, and multicolor photochromism
Nishi, Hiroyasu,Namari, Tomoko,Kobatake, Seiya
, p. 17249 - 17258 (2012/05/04)
Photochromic polymers with various diarylethene derivatives were synthesized by a conventional radical polymerization of styrene derivatives having diarylethene chromophores as the pendant. All the polymers exhibited reversible photochromism in the film a
A proton and optic dual-control molecular switch based on photochromic diarylethene bearing a rhodamine unit
Liu, Weijun,Pu, Shouzhi,Cui, Shiqiang,Liu, Gang,Fan, Congbin
, p. 4236 - 4242 (2011/06/25)
A novel fluorescent switch based on rhodamine B and photochromic diarylethene, 1-[2-methyl-5-(4-methoxylphenyl)-3-thienyl]-2-[2-methyl-5-(4- rhodamine B hydrazine-Schiff base-phenyl)-3-thienyl]perfluorocyclopentene (1), has been successfully synthesized through the condensation of rhodamine B hydrazine and 1-[2-methyl-5-(4-methoxylphenyl)-3-thienyl]-2-[2-methyl-5-(4- formylphenyl)-3-thienyl]perfluorocyclopentene. UV and FL measurements reveal that the compound exhibits good photochromic properties responsive to proton and optic dual inputs. Upon irradiation with 297 nm light, the colorless solution of compound 1 turns blue, while the blue solution becomes colorless after irradiated with visible light (λ>450 nm). Furthermore, upon an addition of H+, the fluorescence resonance energy transfers from the rhodamine unit (FRET donor) to the closed-ring diarylethene unit (FRET acceptor), although no energy transfer occurs when the diarylethene is in the open-ring form. The emission intensity of the rhodamine can be modulated with proton and UV/vis light and molecular-level signal communication has been constructed, indicating high potentials of the compound in molecular switches or naked eye recognition systems.
An organic optical transistor operated under ambient conditions
Paers, Martti,Hofmann, Christiane C.,Willinger, Katja,Bauer, Peter,Thelakkat, Mukundan,Koehler, Juergen
, p. 11405 - 11408 (2012/01/11)
It takes three: The key functionalities of an optical transistor, gating and amplification, are demonstrated exploiting the photophysical properties of a molecular triad (see picture). Two building blocks of the triad are highly efficient fluorophores, whereas the third building block is a photochromic molecule that can be reversibly interconverted between two bistable forms by light.
Photochromism of Diarylethenes Linked by Hydrogen Bonds in the Single-Crystalline Phase
Yamamoto, Satoshi,Matsuda, Kenji,Irie, Masahiro
, p. 4878 - 4886 (2007/10/03)
Photochromic diarylethenes, which bear carboxyl groups at the ortho, meta, or para positions of both terminal phenyl groups, have been synthesized. The diarylethenes adopt linear chain structures as a result of hydrogen bonding in the crystalline phase, a
Diastereoselective cyclization in chiral diarylethene crystals: Polymorphism and selectivity
Yamamoto, Satoshi,Matsuda, Kenji,Irie, Masahiro
, p. 1769 - 1772 (2007/10/03)
(Matrix presented) An optically active photochromic diarylethene, (s)-1-(2-methyl-5-phenyl-3-thienyl)-2-[2-methyl-5-(4-(3-methyl-1-penten-1-yl) phenyl)-3-thienyl]-perfluorocyclopentene ((S)-1a), was synthesized. (S)-1a formed two crystalline phases, α- an
