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  • 101. Wu, Peng
    et al.
    Malkoch, Michael
    Materials Research Laboratories, University of California.
    Hunt, Jasmine N.
    Vestberg, Robert
    Kaltgrad, Eiton
    Finn, M. G.
    Fokin, Valery V.
    Sharpless, K. Barry
    Hawker, Craig J.
    Multivalent, bifunctional dendrimers prepared by click chemistry2005Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, nr 46, s. 5775-5777Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Unsymmetrical dendrimers, containing both mannose binding units and coumarin fluorescent units, have been prepared using click chemistry and shown to be highly efficient, dual-purpose recognition/detection agents for the inhibition of hemagglutination.

  • 102. Wu, Xiujuan
    et al.
    Yang, Xiaonan
    Lee, Yong-Min
    Nam, Wonwoo
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    A nonheme manganese(IV)-oxo species generated in photocatalytic reaction using water as an oxygen source2015Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 51, nr 19, s. 4013-4016Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A nonheme manganese(IV)-oxo complex, [Mn-IV(O)(BQCN)](2+), was generated in the photochemical and chemical oxidation of [Mn-II(BQCN)](2+) with water as an oxygen source, respectively. The photocatalytic oxidation of organic substrates, such as alcohol and sulfide, by [Mn-II(BQCN)](2+) has been demonstrated in both neutral and acidic media.

  • 103. Xie, Xiaojiang
    et al.
    Crespo, Gaston A.
    Zhai, Jingying
    Szilagyi, Istvan
    Bakker, Eric
    Potassium-selective optical microsensors based on surface modified polystyrene microspheres2014Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 50, nr 35, s. 4592-4595Artikel i tidskrift (Refereegranskat)
  • 104.
    Xu, Yunhua
    et al.
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Duan, Lele
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Tong, Lianpeng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Akermark, Bjorn
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Visible light-driven water oxidation catalyzed by a highly efficient dinuclear ruthenium complex2010Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 46, nr 35, s. 6506-6508Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Visible light-driven water oxidation has been achieved by the dinuclear ruthenium complex 1 with a high turnover number of 1270 in a homogeneous system in the presence of a Ru polypyridine complex photosensitizer.

  • 105. Yamamoto, Masanori
    et al.
    Nishizawa, Yusuke
    Chabera, Pavel
    Li, Fusheng
    KTH, Skolan för kemivetenskap (CHE), Kemi.
    Pascher, Torbjörn
    Sundström, Villy
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Imahori, Hiroshi
    Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst2016Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 52, nr 94, s. 13702-13705Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A new subporphyrin was synthesized for use as a molecular sensitizer in electrochemical and dye-sensitized photoelectrochemical water oxidation. A photoelectrochemical cell with a TiO2 electrode modified with the sensitizer and a molecular water oxidation catalyst generated higher photocurrent than reference cells that have electrodes modified with either the photosensitizer or the catalyst under visible light (lambda > 500 nm) illumination. Oxygen evolution was confirmed after photolysis by GC and GC-MS analyses using isotope-labeling experiments. The large molar extinction coefficients of the ring-contracted porphyrin in the visible region enabled kinetic analysis by time-resolved transient absorption spectroscopy, which also supported the photocatalytic activity.

  • 106. Yu, Fengshou
    et al.
    Li, Fei
    Hu, Jixiang
    Bai, Lichen
    Zhu, Yong
    Sun, Licheng
    Electrocatalytic water oxidation by a macrocyclic Cu(II) complex in neutral phosphate buffer2016Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 52, nr 68, s. 10377-10380Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A single-site copper complex, [Cu(TMC)(H2O)](NO3)(2) (1, TMC = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane), was found to be the most active copper-based catalyst towards electrocatalytic water oxidation in neutral aqueous solution. Complex 1 leads to a cathodic shift of approximately 200 mV in potential to reach a current density of 1 mA cm(-2) in comparison with that of the previously reported dinuclear copper complex under the same conditions. Upon immobilization of complex 1 on carbon cloth, it shows greatly improved activity than other copper-based WOCs including CuOx and Cu2+.

  • 107. Zhang, Biaobiao
    et al.
    Li, Fei
    Zhang, Rong
    Ma, Chengbing
    Chen, Lin
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. Dalian University of Technology (DUT), China.
    Characterization of a trinuclear ruthenium species in catalytic water oxidation by Ru(bda)(pic)(2) in neutral media2016Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 52, nr 55, s. 8619-8622Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A Ru-III-O-Ru-IV-O-Ru-III type trinuclear species was crystallographically characterized in water oxidation by Ru(bda)(pic)(2) (H(2)bda = 2,2'-bipyridine- 6,60-dicarboxylic acid; pic = 4-picoline) under neutral conditions. The formation of a ruthenium trimer due to the reaction of Ru-IV QO with Ru-II-OH2 was fully confirmed by chemical, electrochemical and photochemical methods. Since the oxidation of the trimer was proposed to lead to catalyst decomposition, the photocatalytic water oxidation activity was rationally improved by the suppression of the formation of the trimer.

  • 108. Zhang, Dong
    et al.
    Zhang, Qiong
    KTH, Skolan för bioteknologi (BIO), Teoretisk kemi.
    Sua, Jianhua
    Tian, He
    A dual-ion-switched molecular brake based on ferrocene2009Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, nr 13, s. 1700-1702Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A new dual-ion-switched molecular brake was synthesized and operated by chemical reagents (H+/OH- and Zn2+/EDTA), and its rotation could be read out by chromogenic, fluorogenic and electrochemical signals.

  • 109.
    Zhang, Liming
    et al.
    KTH, Tidigare Institutioner                               , Pappers- och massateknik.
    Gellerstedt, Göran
    KTH, Tidigare Institutioner                               , Pappers- och massateknik.
    NMR observation of a new lignin structure, a spiro-dienone2001Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, nr 24, s. 2744-2745Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A spiro-dienone structure (eta -1/alpha -O-alpha) has been observed as one of the important structures present in spruce and aspen lignins, with abundance as high as 3% in spruce lignin.

  • 110. Zhang, Pan
    et al.
    Wang, Mei
    Li, Caixia
    Li, Xueqiang
    Dong, Jingfeng
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Photochemical H-2 production with noble-metal-free molecular devices comprising a porphyrin photosensitizer and a cobaloxime catalyst2010Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 46, nr 46, s. 8806-8808Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Among three noble-metal-free molecular devices (1-3) containing a porphyrin photosensitizer and a cobaloxime catalyst, the one with a zinc porphyrin unit displayed apparently higher efficiency for photoinduced H-2 production than complex 2 with a magnesium porphyrin and 3 with a free-base porphyrin, possibly due to the formation of a TEA center dot center dot center dot ZnPor-Co triad in solution.

  • 111. Zhang, Peili
    et al.
    Wang, Mei
    Gloaguen, Frederic
    Chen, Lin
    Quentelb, Francois
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD.
    Electrocatalytic hydrogen evolution from neutral water by molecular cobalt tripyridine-diamine complexes2013Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 49, nr 82, s. 9455-9457Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A cobalt complex with a tripyridine-diamine pentadentate ligand was found to be a highly active catalyst for electrochemical H-2 production from neutral water, with an activity of 860 mol H-2 (mol cat)(-1) h(-1) (cm(2) Hg)(-1) over 60 h CPE experiment at-1.25 V in a pH 7 phosphate buffer solution, without considerable deactivation.

  • 112. Zhang, Peili
    et al.
    Wang, Mei
    Yang, Yong
    Zheng, Dehua
    Han, Kai
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD.
    Highly efficient molecular nickel catalysts for electrochemical hydrogen production from neutral water2014Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 50, nr 91, s. 14153-14156Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A series of nickel complexes containing N-5-pentadentate ligands with different amine-to-pyridine ratios were studied for electrochemical H-2 production in neutral water and the one with a diamine-tripyridine ligand displays a TON of up to 308000 over 60 h electrolysis at -1.25 V vs. SHE, with a Faradaic efficiency of similar to 91%.

  • 113.
    Zhang, Yan
    et al.
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Angelin, Marcus
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Larsson, Rikard
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Albers, Antonia
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Simons, Adrian
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Ramström, Olof
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Tandem driven dynamic self-inhibition of acetylcholinesterase2010Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 46, nr 44, s. 8457-8459Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A concept of tandem driven dynamic self-inhibition is demonstrated through dynamic inhibitors of acetylcholinesterase (AChE) using reversible transthiolesterification.

  • 114.
    Zhang, Yan
    et al.
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Hu, Lei
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Ramström, Olof
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Double parallel dynamic resolution through lipase-catalyzed asymmetric transformation2013Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 49, nr 18, s. 1805-1807Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Dynamic systems based on double parallel reactions have been generated and resolved in situ by secondary lipase-catalyzed asymmetric transformation, resulting in high chemo- and enantioselectivities.

  • 115.
    Zhang, Yan
    et al.
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Jayawardena, H. Surangi N.
    Yan, Mingdi
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. University of Massachusetts Lowell, MA, United States.
    Ramström, Olof
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Enzyme classification using complex dynamic hemithioacetal systems2016Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 52, nr 28, s. 5053-5056Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A complex dynamic hemithioacetal system was generated for the evaluation of lipase reactivities in organic media. In combination with pattern recognition methodology, twelve different lipases were successfully classified into four distinct groups following their reaction selectivities and reactivities. A probe lipase was further categorized using the training matrix with predicted reactivity.

  • 116. Zheng, Dehua
    et al.
    Wang, Mei
    Chen, Lin
    Wang, Ning
    Cheng, Minglun
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. Dalian Univ Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, China.
    The influence of a S-to-S bridge in diiron dithiolate models on the oxidation reaction: a mimic of the H-ox(air) state of [FeFe]-hydrogenases2014Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 50, nr 66, s. 9255-9258Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Two-electron oxidation of a diiron complex (1) containing a bulky S-to-S bridge with an exocyclic carbonyl group affords [1(OH)](+), which replicates the coordination structure and electronic configuration of H-ox(air), and the chemically reversible reaction between 1 and [1(OH)](+) mimics the bioprocess of interconversion of the inactive H-ox(air) and the active H-red states of the [FeFe]-hydrogenases.

  • 117.
    Zhou, Juan
    et al.
    KTH, Skolan för kemivetenskap (CHE), Kemi.
    Hao, Nanjing
    De Zoyza, Thareendra
    Yan, Mingdi
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. University of Massachusetts, United States.
    Ramström, Olof
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Lectin-gated, mesoporous, photofunctionalized glyconanoparticles for glutathione-responsive drug delivery2015Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 51, nr 48, s. 9833-9836Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A stimuli-responsive drug delivery system based on fluorescent, lectin-gated, mesoporous glyconanoparticles has been developed and evaluated in normal- and cancer lung epithelial cells. The gating process proved efficient, exhibiting good sealing properties in the absence of the glutathione redox trigger, avoiding premature release in normal cells. In the presence of higher levels of glutathione in cancer cells, the lectin gate was rapidly opened and the anticancer drug released.

  • 118. Zhou, Y.
    et al.
    Ramström, Olof
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Dong, H.
    Organosilicon-mediated regioselective acetylation of carbohydrates2012Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 48, nr 43, s. 5370-5372Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Organosilicon-mediated, regioselective acetylation of vicinal- and 1,3-diols is presented. Methyl trimethoxysilane or dimethyl dimethoxysilane was first used to form cyclic 1,3,2-dioxasilolane or 1,3,2-dioxasilinane intermediates, and subsequent acetate-catalyzed monoacylation was efficiently performed by addition of acetic anhydride or acetyl chloride under mild conditions. The reaction exhibited high regioselectivity, resulting in the same protection pattern as in organotin-mediated schemes.

  • 119. Zong, Xu
    et al.
    Na, Yong
    Wen, Fuyu
    Ma, Guijun
    Yang, Jinhui
    Wang, Donge
    Ma, Yi
    Wang, Mei
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Li, Can
    Visible light driven H-2 production in molecular systems employing colloidal MoS2 nanoparticles as catalyst2009Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, nr 30, s. 4536-4538Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Colloidal MoS2 nanoparticles with diameters of less than 10 nm were prepared with a simple solvothermal method and demonstrated high efficiency in catalyzing H-2 evolution in Ru(bpy)(3)(2+)-based molecular systems under visible light.

  • 120.
    Zou, Dapeng
    et al.
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Andersson, Samir
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Zhang, Rong
    KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD.
    Sun, Shiguo
    Åkermark, Björn
    Sun, Licheng
    KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
    Selective binding of cucurbit 7 uril and beta-cyclodextrin with a redox-active molecular triad Ru(bpy)(3)-MV2+-naphthol2007Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, nr 45, s. 4734-4736Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A 1:1:1 inclusion complex is formed by the binding interactions among beta-CD, CB[ 7] hosts, and Ru(bpy)(3)-terminated viologen naphthalene guest in aqueous solution, in which the positions of both CB[7] and beta-CD are closer to the Ru stopper than in the respective 1:1 inclusion complexes, forming a tightened nut on bolt'' structural mode.

  • 121.
    Öberg, Kim
    et al.
    KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik, Ytbehandlingsteknik.
    Hed, Yvonne
    KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik, Ytbehandlingsteknik.
    Joelsson Rahmn, Isabella
    KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik, Ytbehandlingsteknik.
    Kelly, Jonathan
    Löwenhielm, Peter
    Malkoch, Michael
    KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik, Ytbehandlingsteknik.
    Dual-purpose PEG scaffolds for the preparation of soft and biofunctional hydrogels: the convergence between CuAAC and thiol-ene reactions2013Ingår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 49, nr 62, s. 6938-6940Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Orthogonally functionalized PEGs displaying alkenes and azides have been prepared and their dual-purpose scaffolding potential was exploited via click chemistry for controlled insertion of bio-relevant moieties as well as facile fabrication of soft, non-toxic and degradable hydrogels.

123 101 - 121 av 121
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