Tetrahedron Letters(20052010年文章), Dalton Trans.(2008-2010)1. Perumal Rajakumaraand Ramar Padmanabhanb Synthesis, characterization and complexation studies of some novel cyclophane amides and sulfonamidesJ Tetrahedron Letters Volume 51, Issue 7, Pages 999-1130 (17 February 2010)a Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, Indiab Research and Development Centre, Orchid Chemicals and Pharmaceuticals Ltd, Sholinganallure, Chennai 600 119, IndiaAbstractA series of tricyclic tetraamides have been synthesized and were characterized from spectral and XRD studies. XRD studies revealed that the pyridine-based tricyclic cyclophane amide exists with twisted phenyl rings. All the cyclophane compounds form charge-transfer (CT) complexes with TCNQ. Metal ion complexation studies show that the cyclophane amides are more selective towards Cu(II) ions rather than Ni(II) and Cd(II) ions. Keywords: Tricyclic amides; Cyclophane tetraamides; Charge transferGraphical abstract2. Tatiana balosa, b, c, Diego Jimnezb, Ramn Martnez-Meza, b, c, , Jose Vicente Ros-Lisa, Santiago Royoa, b, c, Flix Sancenna, b, c, , , Juan Sotoa, b, Ana M. Costeroa, d, Salvador Gila, d and Margarita Parraa, dHg2+ and Cu2+ selective detection using a dual channel receptor based on thiopyrylium scaffoldings Tetrahedron Letters ,Volume 50, Issue 27, 8 July 2009, Pages 3885-3888aInstituto de Reconocimiento Molecular y Desarrollo Tecnolgico, Centro Mixto Universidad Politcnica de Valencia-Universidad de Valencia, SpainAbstract2,4,6-Triphenylthiopyrylium functionalized with an aza-oxa-thia macrocycle is able to selectively recognize Hg2+ cation by a color change and Cu2+ cation by a remarkable significant emission enhancement.Graphical abstract2,4,6-Triphenylthiopyrylium functionalized with an aza-oxa-thia macrocycle is able to selectively recognize Hg2+ cation by a color change and Cu2+ cation by a remarkable significant emission enhancement.Keywords: Dual channel receptor; Chromogenic Hg2+ recognition; Fluorogenic Cu2+ recognition; Thiopyrylium derivative3. Tetrahedron Letters ,Volume 50, Issue 21, 27 May 2009, Pages 2459-2461 Highly water-soluble, OFFON, dual fluorescent probes for sodium and potassium ions Premchendar Nandhikondaa, Michael P. Begayea and Michael D. Heagy, a, aNew Mexico Institute of Mining and Technology, Department of Chemistry, Socorro, NM 87801, United StatesAbstractFluorescent probes 1 and 2 were conveniently synthesized from 4-sulfo-1, 8-naphthalic anhydride, potassium salt, and 4-aminobenzo-15-crown-5 and also from 4-aminobenzo-18-crown-6. These sensors exhibit dual emission and ratiometric absorption, are water soluble, and show good selectivity for sodium and potassium ions.Graphical abstract4. Tetrahedron Letters ,Volume 50, Issue 15, 15 April 2009, Pages 1720-1722Ultrasound-promoted aromatic nucleophilic substitution of dichlorobenzene iron(II) complexes Noureddine Raouafia, Nadra Belhadjb, Khaled Boujlela, Ali Ourarib, Christian Amatorec, Emmanuel Maisonhautec and Bernd Schllhornc, , aDpartement de Chimie, Facult des Sciences de Tunis, Universit de Tunis El Manar, 2092 Tunis, TunisiaAbstractThe nucleophilic aromatic substitution under ultrasound irradiation of a dichlorobenzene iron 6-complex with various secondary amines is reported. The reaction time at moderate temperatures is considerably shortened (15min) compared to non sonicated reaction conditions at room temperature (several days) or at solvent refluxing temperature (1248h). Controlled mono- or di-substitution was achieved by the tuning of the amine nucleophilicity and the solvent polarity. The method was successfully applied to the synthesis of differently substituted phenylenediamines.Graphical abstractKeywords: Ultrasound; Nucleophilic substitution; Dihalobenzenes; Iron arene complexes; Phenylene diamines; Anilines5.Tetrahedron Letters ,Volume 50, Issue 6, 11 February 2009, Pages 671-675 A highly selective fluorescent chemosensor for silver(I) in water/ethanol mixture Chul Soon Parka, Jai Young Leea, Eun-Ju Kanga, Ji-Eun Leea, b and Shim Sung Leea, , aDepartment of Chemistry (BK21) and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South KoreabCentral Instrument Facility, Gyeongsang National University, Jinju 660-701, South KoreaAbstractSynthesis, photophysical, and complexation properties of fluorescent chemosensors, L1 and L2, with receptor-spacer-fluorophore motif (L1: NS2O2-cyclic receptor, L2: acyclic analogue receptor) are described. Maximum chelation-enhanced fluorescence effect (TURN-ON type) was observed in the presence of Ag+ for both fluoroionophores in a 1:1 (v/v) aqueous ethanol solution: remarkably superior selectivity of L1 (150-fold) with cyclic receptor than that of the L2 (50-fold) with acyclic analogue was found. According to the fluorescence and NMR titr