Showing 281 - 300 results of 847 for search '"aromaticity"', query time: 0.06s Refine Results
  1. 281

    Molecular Iodine: A Versatile Catalyst for the Synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-trione Derivatives in Ethanol by Xiao Wang, Guangzhou Lu, Weiwei Ma, Liqzang Wu

    Published 2011-01-01
    “…An efficient method for the synthesis of 2H-indazolo[2,1-b] phthalazine-1,6,11(13H)-trione derivatives by a three-component condensation reaction of dimedone, aromatic aldehydes and phthalhydrazide in the presence of a catalytic amount of molecular iodine in ethanol is described.…”
    Get full text
    Article
  2. 282

    Pentafluoropropionic Acid: An Efficient and Metal-Free Catalyst for the One-Pot Synthesis of Tetrahydrobenzo[b]pyran Derivatives by Naser Montazeri, Taghva Noghani, Mona Ghorchibeigy, Rozita Zoghi

    Published 2014-01-01
    “…Pentafluoropropionic acid (PFPA) efficiently catalyzes the one-pot, three-component reaction of aromatic aldehyde, malononitrile, and dimedone to yield tetrahydrobenzo[b]pyran derivatives in high yields. …”
    Get full text
    Article
  3. 283

    Removal of pyrene from aqueous solutions by adsorption onto Brazilian peat samples by Francine Girardello, Suzimara Rovani, Marcelo Giovanela, Andreia Neves Fernandes

    Published 2016-12-01
    “…Pyrene is a polycyclic aromatic hydrocarbon, classified as a priority pollutant. …”
    Get full text
    Article
  4. 284

    Research on Fluorescence Spectroscopy Characteristics of Dissolved Organic Matter of Landfill Leachate in the Rear Part of Three Gorges Reservoir by Zhigang Xie, Wei Guan

    Published 2015-01-01
    “…Characteristic frequency area analysis showed that humic acids (HA), and fulvic acids (FA) contain more than hydrophilic organic matter (HyI) aromatic ring structure, and FA aromatic ring structure is the most. …”
    Get full text
    Article
  5. 285

    Influence of Aggregate and Asphalt Type on the Bond Strength between Asphalt and Aggregates and Its Self-Healing Properties by Xinli Gan, Wenli Zhang, Jie Li, Hui Tang, Peiyuan Zhong

    Published 2022-01-01
    “…Third, the asphalt was extracted into aromatic, saturated, colloidal, and asphaltene by an asphalt component separation test, and the bond strength between each asphalt component and aggregate was tested. …”
    Get full text
    Article
  6. 286

    Trifluoroacetic Acid as an Efficient Catalyst for the Room Temperature Synthesis of 2-Aryl-1-arylmethyl-1H-1,3-benzimidazoles in Aqueous Media by Mohammad R. Mohammadizadeh, S. Zeinakhatoun Taghavi

    Published 2011-01-01
    “…Trifluoroacetic acid (TFA) is introduced as a commercially available, inexpensive and effective catalyst for the selective and eco-compatible synthesis of 2-aryl-1-arylmethyl-1H-1,3-benzimidazoles via condensation reaction of o-phenylenediamine derivatives and aromatic aldehydes in ethanol/water at room temperature.…”
    Get full text
    Article
  7. 287

    CO2-philicity of crude oil constituents: A computational study by Lionel T. Fogang, Syed M.S. Hussain, Theis I. Solling

    Published 2025-06-01
    “…In all cases, CO2 has the largest affinity towards the aromatic ring. This preference is small (free energy differences of less than 5 kJ mol−1). …”
    Get full text
    Article
  8. 288

    Theoretical Investigation on the Solubilization in Water of Functionalized Single-Wall Carbon Nanotubes by Michael Mananghaya, Emmanuel Rodulfo, Gil Nonato Santos, Al Rey Villagracia

    Published 2012-01-01
    “…There are three water-dispersible SWCNTs used in this study that were functionalized with (a) formic acid, as a model of carboxylic acid, (b) isophthalic acid, as a model aromatic dicarboxylic acid, and (c) benzenesulfonic acid, as a model aromatic sulfonic acid. …”
    Get full text
    Article
  9. 289

    Photoredox/Cr-catalyzed enantioselective radical-polar crossover transformation via C-H functionalization by Si-Yuan Tang, Zhan-Jie Wang, Yu Ao, Ning Wang, Huan-Ming Huang

    Published 2025-02-01
    “…The asymmetric radical-polar crossover transformation could build two chiral centers simultaneously and demonstrates broad substrate tolerance, accommodating various drug-derived aldehydes, (hetero)aromatics, and 1,3-diene derivatives. Preliminary mechanistic studies indicate the involvement of a radical intermediate, with the chiral allylic chromium species reacting with various aliphatic and aromatic aldehydes through Zimmerman–Traxler transition states enabled by dual photoredox and chiral chromium catalysis.…”
    Get full text
    Article
  10. 290

    Optical Energy Transfer Mechanisms: From Naphthalene to Biacetyl in Liquids and from Pyrazine to Biacetyl by Fuat Bayrakceken, Korkut Yegin, Erdal Korkmaz, Yakup Bakis, Bayram Unal

    Published 2012-01-01
    “…The sensitization of biacetyl by several aromatic donors has been investigated in detail. An aromatic donor, pyrazine, is raised to its first excited singlet state by absorption of ultraviolet radiation. …”
    Get full text
    Article
  11. 291

    Zirconyl (IV) Nitrate as Efficient and Reusable Solid Lewis Acid Catalyst for the Synthesis of Benzimidazole Derivatives by Pratapsinha B. Gorepatil, Yogesh D. Mane, Vilas S. Ingle

    Published 2013-01-01
    “…The present paper introduces a simple and efficient method for the synthesis of substituted benzimidazoles by heterocyclization of different o-phenylenediamines and substituted aromatic carboxylic acid/aldehyde in the presence of zirconyl nitrate as catalyst in ethanol under reflux, which produced excellent yield of corresponding benzimidazoles in a short reaction time with reusability of catalyst.…”
    Get full text
    Article
  12. 292

    Nucleophilicity Index Based on Atomic Natural Orbitals by Dariusz W. Szczepanik, Janusz Mrozek

    Published 2013-01-01
    “…The results of test calculations considering the regioselectivity problem in electrophilic aromatic substitution to the benzene derivatives are presented and briefly discussed.…”
    Get full text
    Article
  13. 293

    L as an Efficient Catalyst for Synthesis of Aldimines at Ambient Temperature Condition by S. S. Kottawar, S. V. Goswami, P. B. Thorat, S. R Bhusare

    Published 2011-01-01
    “…Some new aldimines were synthesized from substituted 2-amino thiazoles and different aromatic aldehydes using L-proline as an efficient catalyst. …”
    Get full text
    Article
  14. 294

    Development of Validated Spectrophotometric Methods for Estimation of Ethacridine Lactate in Pharmaceutical Formulations by Aziz Unnisa, N. Manasa, P. Lakshmi Ravali

    Published 2011-01-01
    “…Method A is based on the condensation of the primary aromatic amino group of ethacridine lactate with an aromatic aldehyde (p-Dimethylamino- cinnamaldehyde) to form a chromophore with absorption maximum of 600nm. …”
    Get full text
    Article
  15. 295

    Light-Emitting Polymer Nanocomposites by Kyle Gipson, Brett Ellerbrock, Kathryn Stevens, Phil Brown, John Ballato

    Published 2011-01-01
    “…The selected aromatic ligand systems were characterized using infrared spectroscopy, thermal analysis, rheological measurements, and optical spectroscopy. …”
    Get full text
    Article
  16. 296

    Spectroscopic Characteristics of Dissolved Organic Matter in Afforestation Forest Soil of Miyun District, Beijing by Shi-Jie Gao, Chen Zhao, Zong-Hai Shi, Jun Zhong, Jian-Guo Liu, Jun-Qing Li

    Published 2016-01-01
    “…And the characterization of DOM implied that UV humic-like substances were the major fluorophores components in the DOM of the soil samples, which consisted of aliphatic chains and aromatic components with carbonyl, carboxyl, and hydroxyl groups.…”
    Get full text
    Article
  17. 297

    Distillation of Essential Oils by Elise V. Pearlstine

    Published 2011-06-01
    “…Essential oils are volatile, aromatic oils obtained from plants and used for fragrance, flavoring, and health and beauty applications. …”
    Get full text
    Article
  18. 298

    One-Pot Synthesis of 1,8-Dioxo-octahydroxanthenes Utilizing Silica-Supported Preyssler Nano Particles as Novel and Efficient Reusable Heterogeneous Acidic Catalyst by Ali Javid, Majid M. Heravi, Fatemeh F. Bamoharram

    Published 2011-01-01
    “…A highly efficient one-pot synthesis of 1,8-dioxo-octahydroxanthenes from dimedone and various aromatic aldehydes under reflux conditions in water, catalyzed by silica-supported preyssler nano particles (SPNP) is reported. …”
    Get full text
    Article
  19. 299

    Efficient and Convenient Synthesis of 1,8-Dioxodecahydroacridine Derivatives Using Cu-Doped ZnO Nanocrystalline Powder as a Catalyst under Solvent-Free Conditions by Heshmatollah Alinezhad, Sahar Mohseni Tavakkoli

    Published 2013-01-01
    “…A simple and convenient one-step method for synthesis of acridines and their derivatives from condensation of aromatic aldehydes, cyclic diketones, and aryl amines using Cu-doped ZnO nanocrystalline powder as a catalyst is reported. …”
    Get full text
    Article
  20. 300

    Distillation of Essential Oils by Elise V. Pearlstine

    Published 2011-06-01
    “…Essential oils are volatile, aromatic oils obtained from plants and used for fragrance, flavoring, and health and beauty applications. …”
    Get full text
    Article