Chemistry – An Asian Journal

Cover image for Vol. 12 Issue 2

January 17, 2017

Volume 12, Issue 2

Pages 174–275

  1. Cover Pictures

    1. Top of page
    2. Cover Pictures
    3. Communications
    4. Full Papers
    1. You have free access to this content
      Cover Picture: Finding a New Crystalline Sponge from a Crystallographic Database (Chem. Asian J. 2/2017) (page 174)

      Dr. Yasuhide Inokuma, Kazuki Matsumura, Dr. Shota Yoshioka and Prof. Makoto Fujita

      Version of Record online: 22 DEC 2016 | DOI: 10.1002/asia.201601629

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      A new crystalline sponge, which can absorb and orient guest compounds to enable single-crystal X-ray analysis of them, was found from a crystallographic database by adopting empirical searching conditions. In the initial search using the Cambridge Structural Database, more than 2,800 crystal structures with void spaces were found as promising candidates. After the optimization of solvent and guest-soaking conditions, a coordination network crystal with 1-dimensional channels (cross section: 10 × 10 Å2) was used for the crystallographic analysis of a liquid compound. More information can be found in the Communication by Yasuhide Inokuma, Makoto Fujita et al. on page 208 in Issue 2, 2017 (DOI: 10.1002/asia.201601551).

    2. You have free access to this content
      Inside Cover: Visible-Light-Promoted AuI to AuIII Oxidation in Triazol-5-ylidene Complexes (Chem. Asian J. 2/2017) (page 175)

      Dr. Daniel Mendoza-Espinosa, David Rendón-Nava, Dr. Alejandro Alvarez-Hernández, Dr. Deyanira Angeles-Beltrán, Dr. Guillermo E. Negrón-Silva and Dr. Oscar R. Suárez-Castillo

      Version of Record online: 22 DEC 2016 | DOI: 10.1002/asia.201601599

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      Reaction of triazolium precursors [MIC(CH2)n-H+]I (n=1–3) with potassium hexamethyldisilazane (KHMDS) and AuCl(SMe2) generates the gold(I) complexes of the type Au(I)–MIC. Visible-light exposure of the latter complexes promotes a spontaneous disproportionation process rendering gold(III) complexes of the type Au(III)–(MIC)2. Both the Au(I) and Au(III) complex series were tested in the catalytic hydrohydrazination of terminal alkynes using hydrazine as nitrogen source. More information can be found in the Communication by Daniel Mendoza-Espinosa, Guillermo E. Negrón-Silva et al. on page 203 in Issue 2, 2017 (DOI: 10.1002/asia.201601499).

  2. Communications

    1. Top of page
    2. Cover Pictures
    3. Communications
    4. Full Papers
    1. Drug Delivery

      Design of Block Copolymer Micellar Aggregates for Co-Delivery of Enzyme and Anticancer Prodrug (pages 176–180)

      Hongping Li, Lulu Chen, Yuting Shi, Binbin Yuan, Prof. Dr. Yingxia Ma, Prof. Dr. Hua Wei and Prof. Dr. Guanghui Zhao

      Version of Record online: 14 DEC 2016 | DOI: 10.1002/asia.201601198

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      Kill those cancer cells! A one-step enzyme–prodrug therapy (EPT) strategy is described. The method shows great potential in cancer therapy, offering a structurally simple and highly tunable platform for the synchronous delivery of enzymes and prodrugs in EPT.

    2. Sensors

      Bigger and Brighter Fluorenes: Facile π-Expansion, Brilliant Emission and Sensing of Nitroaromatics (pages 181–189)

      Jagarapu Ramakrishna and Dr. Parthasarathy Venkatakrishnan

      Version of Record online: 14 DEC 2016 | DOI: 10.1002/asia.201601359

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      It makes a lot of sense: Highly emissive π-expanded fluorenes as well as spirobifluorenes obtained via a regioselective oxidative cyclization procedure are shown to sense nitroaromatics at the ppb level.

    3. Synthetic Chemistry

      High-Throughput Synthetic Chemistry Enabled by Organic Solvent Disintegrating Tablet (pages 190–193)

      Tingting Li, Lei Xu, Dr. Yanjun Xing and Dr. Bo Xu

      Version of Record online: 16 DEC 2016 | DOI: 10.1002/asia.201601487

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      Just like a pill! Our organic solvent disintegrating tablet (O-Tab) technology has shown potential to make industrial/synthetic chemistry more efficient. As is the case with pharmaceutical tablets, the reagent-containing O-Tab is mechanically strong, but disintegrates rapidly when in contact with reaction media (organic solvents).

    4. Superionic Conductivity

      Superionic Conductivity in Hybrid of 3-Hydroxypropanesulfonic Acid and Graphene Oxide (pages 194–197)

      Kosuke Wakata, Dr. Mohammad Razaul Karim, Md. Saidul Islam, Ryo Ohtani, Masaaki Nakamura, Prof. Michio Koinuma and Prof. Shinya Hayami

      Version of Record online: 21 DEC 2016 | DOI: 10.1002/asia.201601488

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      GO with GO–HPS! Organic guest molecules at the graphene oxide (GO) interlayer usually reduce the proton conductivity of a GO. A hybrid of GO and 3-hydroxypropanesulfonic acid (HPS) exhibited a 20-times higher proton conductivity value (σ=10−2−10−1 S cm−1), which is also the highest of all carbon-based hybrid materials reported to date. Other similar acids could serve as guest molecules for improving proton conductivity of carbon and other layered materials in the future.

    5. Organogels

      Highly Fluorescent Non-Conventional Boron-Difluoride-Based π Organogel with Gelation-Assisted Piezochromism (pages 198–202)

      Sa Wang, Dr. Haichuang Lan, Dr. Shuzhang Xiao, Ronghua Tan and Dr. Yunxiang Lu

      Version of Record online: 7 DEC 2016 | DOI: 10.1002/asia.201601492

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      This gel helps you handle the pressure! A π gelator whose balanced intermolecular π–π interactions play an important role in its supramolecular self-assembly is reported herein. The dried gel responds to pressure sensitively, making it a potential pressure sensor.

    6. Hydrohydrazination

      Visible-Light-Promoted AuI to AuIII Oxidation in Triazol-5-ylidene Complexes (pages 203–207)

      Dr. Daniel Mendoza-Espinosa, David Rendón-Nava, Dr. Alejandro Alvarez-Hernández, Dr. Deyanira Angeles-Beltrán, Dr. Guillermo E. Negrón-Silva and Dr. Oscar R. Suárez-Castillo

      Version of Record online: 8 DEC 2016 | DOI: 10.1002/asia.201601499

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      A good promotion: The visible-light-promoted disproportionation of AuI complexes (4) which produces AuIII complexes of type 5 is reported. Both the AuI and AuIII series were tested in the hydrohydrazination of terminal alkynes using hydrazine as nitrogen source.

    7. Crystalline Sponges | Very Important Paper

      Finding a New Crystalline Sponge from a Crystallographic Database (pages 208–211)

      Dr. Yasuhide Inokuma, Kazuki Matsumura, Dr. Shota Yoshioka and Prof. Makoto Fujita

      Version of Record online: 15 DEC 2016 | DOI: 10.1002/asia.201601551

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      Seek, and you will find: Promising candidates for new crystalline sponges for analysis of the structures of non-crystalline compounds by X-ray diffraction were selected from a crystallographic database using semi-empirical searching conditions. After optimization of the guest-soaking conditions, a new crystalline sponge with large one-dimensional channels was discovered.

    8. Tandem Reactions

      Tandem Thorpe Reaction/Palladium Catalyzed Asymmetric Allylic Alkylation: Access to Chiral β-enaminonitriles with Excellent Enantioselectivity (pages 212–215)

      Da-Chang Bai, Xiu-Yan Liu, Hao Li, Dr. Chang-Hua Ding and Prof. Dr. Xue-Long Hou

      Version of Record online: 21 DEC 2016 | DOI: 10.1002/asia.201601571

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      New type of nucleophile in Pd-catalyzed AAA: A 3-imino nitrile carbanion, generated in situ by Thorpe reaction of acetonitrile, reacted with mono-substituted allyl reagents under Pd/SIOCPhox catalysis, affording β-enaminonitrile products in high yields with excellent regio- and enantioselectivities.

  3. Full Papers

    1. Top of page
    2. Cover Pictures
    3. Communications
    4. Full Papers
    1. Emitting Materials

      Constructing a Novel Dendron for a Self-Host Blue Emitter with Thermally Activated Delayed Fluorescence: Solution-Processed Nondoped Organic Light-Emitting Diodes with Bipolar Charge Transfer and Stable Color Purity (pages 216–223)

      Dr. Xinxin Ban, Prof. Baoping Lin, Prof. Wei Jiang and Prof. Yueming Sun

      Version of Record online: 20 DEC 2016 | DOI: 10.1002/asia.201601384

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      Into the blue: By introducing diphenylphosphine oxide groups, the molecular encapsulation and charge balance properties of a self-host blue emitter are significantly enhanced. This study not only enriches the types of dendrons that can be used for self-host blue emitters but also demonstrates the positive effect of bipolar dendrons on the electroluminescent performance of nondoped devices.

    2. Helical Structures

      Superhelices Self-Assembled from Polypeptide-Based Polymer Mixtures: Multistranded Features (pages 224–232)

      Xingyu Zhu, Prof. Dr. Jiaping Lin and Dr. Chunhua Cai

      Version of Record online: 16 DEC 2016 | DOI: 10.1002/asia.201601403

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      A twisted tale: Poly(γ-benzyl-l-glutamate)-block-poly(ethylene glycol) rod–coil block copolymers and poly(γ-benzyl-l-glutamate) mixtures can self-assemble into superhelices that have multiple strands with tunable characteristics. The strand number is dependent on the initial polymer concentration of the self-assembly, the self-assembly temperature, and the weight fraction of block copolymers in the mixture (see figure).

    3. DNA Probes

      Key Structural Elements of Unsymmetrical Cyanine Dyes for Highly Sensitive Fluorescence Turn-On DNA Probes (pages 233–238)

      Kakishi Uno, Taeko Sasaki, Nagisa Sugimoto, Dr. Hideto Ito, Dr. Taishi Nishihara, Dr. Shinya Hagihara, Prof. Dr. Tetsuya Higashiyama, Dr. Narie Sasaki, Dr. Yoshikatsu Sato and Prof. Dr. Kenichiro Itami

      Version of Record online: 16 DEC 2016 | DOI: 10.1002/asia.201601430

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      Amino magic: A systematic structure–property relationship study has revealed that the dialkylamino group at the 2-position of quinoline in unsymmetrical cyanine dyes (see figure) plays a critical role in enhancement of the fluorescence upon binding to double-stranded DNA. The newly developed dyes were also able to stain the nucleus specifically in fixed HeLa cells examined by using a confocal laser-scanning microscope.

    4. C−N Bond Cleavage

      Unprecedented Reaction Pathway of Sterically Crowded Calcium Complexes: Sequential C−N Bond Cleavage Reactions Induced by C−H Bond Activations (pages 239–247)

      Dr. Yang Yang, Dr. Haobing Wang and Prof. Dr. Haiyan Ma

      Version of Record online: 21 DEC 2016 | DOI: 10.1002/asia.201601497

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      What is calcium good for? The first example of calcium-involved C−N bond cleavages (aza-[1,2]-Wittig rearrangement and β-amino elimination) of tertiary amine ligands, arising from a steric hindrance-induced intramolecular C−H bond activation in calcium complexes, is reported.

    5. Molecular Switches

      Photoswitchable and Water-Soluble Fluorescent Nano-Aggregates Based on a Diarylethene–Dansyl Dyad and Liposome (pages 248–253)

      Prof. Hongbo Cheng, Dr. Pin Ma, Dr. Yanan Wang, Dr. Guofei Hu, Prof. Shibi Fang, Prof. Yanyan Fang and Prof. Yuan Lin

      Version of Record online: 16 DEC 2016 | DOI: 10.1002/asia.201601501

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      Showing no signs of fatigue: A unique approach has been developed to generate water-soluble and stable photoswitchable fluorescence nano-aggregates based on a diarylethene–dansyl dyad and a liposome. The nano-aggregates exhibit a remarkable photostability and fatigue resistance that is crucial for their practical application.

    6. Structure–Activity Relationships

      Luminescent Ruthenium(II) Polypyridyl Complexes as Nonviral Carriers for DNA Delivery (pages 254–264)

      Dr. Satish S. Bhat, Prof. Vidyanand K. Revankar, Dr. Ayesha Khan, Dr. Rahul V. Pinjari and Dr. Marek Necas

      Version of Record online: 15 DEC 2016 | DOI: 10.1002/asia.201601515

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      Label-free DNA carriers: Two new ruthenium(II) polypyridyl complexes have been developed as nonviral vectors for DNA delivery. These complexes efficiently condense DNA into globular nanoparticles, and thus, can be used as potential DNA carriers (see figure).

    7. Rotaxanes | Very Important Paper

      Insights into the Difference Between Rotaxane and Pseudorotaxane (pages 265–270)

      He-Lue Sun, Dr. Heng-Yi Zhang, Zhen Dai, Xu Han and Prof. Dr. Yu Liu

      Version of Record online: 16 DEC 2016 | DOI: 10.1002/asia.201601545

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      Wheels of change: Pseudo[2]rotaxane 1⊂α-CD and pseudo[3]rotaxane 1⊂2CB[7] were constructed by using axle molecule 1 with α-cyclodextrin (α-CD) and cucurbit[7]uril (CB[7]), respectively. When the CB[7] units were capped at the terminal of 1⊂α-CD, the heteropseudo[4]rotaxane 1⊂α-CD⋅2CB[7] was successfully obtained. Significantly, it displayed high stability towards UV irradiation and harsh temperatures, hence, it can be regarded as a [2]rotaxane (see figure).

    8. Macrocycles

      An Obtuse-angled Corner Unit for Fluctuating Carbon Nanohoops (pages 271–275)

      Dr. Zhe Sun, Naoya Miyamoto, Dr. Sota Sato, Prof. Dr. Hidetoshi Tokuyama and Prof. Dr. Hiroyuki Isobe

      Version of Record online: 21 DEC 2016 | DOI: 10.1002/asia.201601614

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      Jumping through nanohoops: When opened by a bicyclic structure, a corner unit for nanohoop widens the circle of macrocycles and allows for one-pot assembly of seven units. A nanohoop with anthracenylene panels was completed by aromatization and demonstrated the presence of fluctuating structures in solution.

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