A5046738528- Synthesis and Properties of Aromatic Compounds
- Supramolecular Chemistry and Complexes
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- DNA and Nucleic Acid Chemistry
- Molecular Sensors and Ion Detection
- Porphyrin and Phthalocyanine Chemistry
- Luminescence and Fluorescent Materials
- Chemical Reaction Mechanisms
- Chemical Synthesis and Reactions
- Crystallography and molecular interactions
- Synthetic Organic Chemistry Methods
- Inorganic and Organometallic Chemistry
- Photochromic and Fluorescence Chemistry
- Chemical Synthesis and Analysis
- Lanthanide and Transition Metal Complexes
- Asymmetric Synthesis and Catalysis
- Radical Photochemical Reactions
- Organic Chemistry Cycloaddition Reactions
- Organic and Inorganic Chemical Reactions
- Organic Light-Emitting Diodes Research
- Carbohydrate Chemistry and Synthesis
- Oxidative Organic Chemistry Reactions
- Organic Electronics and Photovoltaics
- Organometallic Complex Synthesis and Catalysis
Saga University
2015-2024
University of Southern California
1987-2020
Guizhou University
2010-2015
John Wiley & Sons (United States)
2015
Bioengineering Center
2015
National Center for Genetic Engineering and Biotechnology
2015
RIKEN Center for Emergent Matter Science
2013
Minia University
2013
Loughborough University
2013
University of Hull
2013
A ratiometric fluorescent receptor with a C(3) symmetric structure based on pyrene-linked triazole-modified homooxacalix[3]arene (L) was synthesized and characterized. This system exhibited an interesting detection signal output for targeting cations anions through switching the excimer emission of pyrene from "on-off" to "off-on" type in neutral solution. (1)H NMR titration results suggested that Zn(2+) center L·Zn(2+) provided excellent pathway organizing anion binding groups optimal...
Four mechanofluorochromic (MFC) luminogenic materials were prepared and found to exhibit outstanding mechanically-induced emission enhancement (MIEE) by virtue of substituent position effects. Such can be used in OLED devices.
Reaction of [V(X)(OR)3] (X=O, Np-tolyl; R=Et, nPr or tBu) with p-tert-butylhexahomotrioxacalix[3]areneH3, LH3, affords the air-stable complexes [{V(X)L}n] n=1 (1); X=Np-tolyl, n=2 (2)). Alternatively, 1 is readily available either from interaction [V(mes)3THF] and subsequent oxidation O2 upon reaction LLi3 [VOCl3]. [V(Np-tolyl)(OtBu)3] 1,3-dimethylether-p-tert-butylcalix[4]areneH2, Cax(OMe)2(OH)2, afforded [{VO(OtBu)}2(mu-O)Cax(OMe)2(O)2].2 MeCN (42 MeCN), in which two vanadium atoms are...
A new type of fluorescent chemosensor based on homooxacalix[3]arene was synthesized. The sensor highly selective for Pb2+ in comparison with other metal ions tested by enhancement the monomer emission pyrene. C3 symmetric structure has potential application development a ratiometric heavy ions.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective preparation. 30. A convenient preparation of 5,13-di-tert-butyl-8,16-disubstituted-[2.2]metacyclophanes and their trans-tert-butylation halogenation reactionsMasashi Tashiro Takehiko YamatoCite this: J. Org. Chem. 1981, 46, 8, 1543–1552Publication Date (Print):April 1, 1981Publication History Published online1 May 2002Published inissue 1 April...
Abstract A new series of pyrene‐based, pure‐blue, fluorescent, stable monomers, namely 2,7‐di‐ tert ‐butyl‐4,5,9,10‐tetrakis( p ‐R‐phenylethynyl)pyrenes, have been successfully synthesised by Pd/Cu‐catalysed Sonogashira coupling in excellent yield. The cruciform‐shaped, π‐conjugated structures were fully characterised 1 H/ 13 C NMR and IR spectroscopy, mass spectrometry elemental analysis. As revealed from single‐crystal X‐ray analysis, there is a herringbone pattern between stacked columns,...
The first example of aryl-functionalized, butterfly-shaped, highly fluorescent and stable blue-emitting monomers, namely, 7-tert-butyl-1,3,5,9-tetrakis(p-R-phenyl)pyrenes, were synthesized by the Suzuki–Miyaura cross-coupling reaction from a novel bromide precursor 1,3,5,9-tetrabromo-7-tert-butylpyrene. crystal structures optical electronic properties have been investigated.
Two pyrene-based MCLs with sensitive and reversible mechanochromic properties different optical phenomena were prepared. One displays ACQ properties, while the other shows obvious AEE a >10-fold increased Φ FL amplitude.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAromatic substitution. 53. Electrophilic nitration, halogenation, acylation, and alkylation of (.alpha.,.alpha.,.alpha.-trifluoromethoxy)benzeneGeorge A. Olah, Takehiko Yamato, Toshihiko Hashimoto, Joseph G. Shih, Nirupam Trivedi, Brij P. Singh, Marc Piteau, Judith OlahCite this: J. Am. Chem. Soc. 1987, 109, 12, 3708–3713Publication Date (Print):June 1, 1987Publication History Published online1 May 2002Published inissue 1 June...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetacyclophanes and related compounds. 14. Preparation of 8,16-difluoro[2.2]metacyclophaneMasashi Tashiro Takehiko YamatoCite this: J. Org. Chem. 1985, 50, 16, 2939–2942Publication Date (Print):August 1, 1985Publication History Published online1 May 2002Published inissue 1 August 1985https://pubs.acs.org/doi/10.1021/jo00216a026https://doi.org/10.1021/jo00216a026research-articleACS PublicationsRequest reuse permissionsArticle...
Treatment of the heterobimetallic iron(II) alkoxides [(THF)MFe(OtBu)(3)](2) with p-tert-butylcalix[4]areneH(4) (L(1)H(4)) affords oxo-bridged diiron(III) complexes {Fe[M(NCMe)(x)](2)L(1)}(2)(mu-O), M = Na, x 2 1 8(CH(3)CN), K, 3 3.5(CH(3)CN); similar use p-tert-butylcalix[6]areneH(6) (L(2)H(6)) afforded [{Fe(2)(mu-O)Na(2)(OH(2))(NCMe)(2)L(2)}(2)][{Fe(2)(mu-O)Na(OH(2))(NCMe)(6)L(2)}(2)](2-)[Na(NCMe)(5)](2)(2+) 9.46(CH(3)CN) and [{Fe(2)(mu-O)L(2)(K(NCMe)(2))(2)}(2)] 4 10.8(MeCN), respectively....
A series of pyrene-based Y-shaped blue emitters, namely, 7-tert-butyl-1,3-diarylpyrenes 4 were synthesized by the Suzuki cross-coupling reaction 7-tert-butyl-1,3-dibromopyrene with a variety p-substituted phenylboronic acids in good to excellent yields. These compounds fully characterized X-ray crystallography, UV/Vis absorption and fluorescence spectroscopy, DFT calculations, thermogravimetric analysis, differential scanning calorimetry. Single-crystal analysis revealed that arylpyrenes...
The synthesis, crystal structures and photophysical properties of two types pyrene-cored blue-light emitting [4]helicenes (7 9) are reported. chemical all synthesized compounds were fully confirmed by 1H 13C NMR spectra, mass spectroscopy as well elemental analysis. Single-crystal X-ray analysis these revealed that there laterally naphthalene annulated helical architectures, which clearly influenced different R substituents. the investigated in both solutions films, along with...
An efficient synthetic approach for functionalization of both the active sites (1,3-) and K-region (4,5,9,10-) pyrene was accomplished by bromination oxidation with considerable yield. These novel pyrene-fused azaacenes were thoroughly investigated X-ray diffraction studies, electrochemistry, DFT calculations.
This article presents a novel asymmetrical functionalization strategy for the construction of dipolar molecules via efficient regioselective along Z-axis pyrene at both 1,3- and 6,8-positions. Three asymmetrically substituted 1,3-diphenyl-6,8-R-disubsituted pyrenes were fully characterized by X-ray crystallography, photophysical properties, electrochemistry, density functional theory calculations.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic reactions catalyzed by solid superacids. 5. Perfluorinated sulfonic acid resin (Nafion-H) intramolecular Friedel-Crafts acylationTakehiko Yamato, Chieko Hideshima, G. K. Surya Prakash, and George A. OlahCite this: J. Org. Chem. 1991, 56, 12, 3955–3957Publication Date (Print):June 1, 1991Publication History Published online1 May 2002Published inissue 1 June...
Particle sizes of a supramolecular polymer composed diarylethene having two quadruple hydrogen bonding moieties were changed photoreversibly.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetacyclophanes and related compounds. 4. Halogenations of 8,16-dialkyl-anti-5,13-di-tert-butyl[2.2]metacyclophan-1-enes 2,7-di-tert-butyl-trans-10b,10c-dialkyl-10b,10c-dihydropyrenesMasashi Tashiro Takehiko YamatoCite this: J. Am. Chem. Soc. 1982, 104, 13, 3701–3707Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https://doi.org/10.1021/ja00377a027RIGHTS & PERMISSIONSArticle...