65350-59-6Relevant academic research and scientific papers
Blue-green light emission from self-assembled bipyridinium thin films
Zheng, Haipeng,Zhang, Ruifeng,Wu, Ying,Shen, Jiacong
, p. 909 - 910 (1998)
The photoluminescence (PL) properties of a short ribbon-like conjugated bipyridinium and its application in the design and fabrication of organic LED devices were discussed.
A graphene oxide-organic dye ionic complex with DNA-sensing and optical-limiting properties
Balapanuru, Janardhan,Yang, Jia-Xiang,Xiao, Si,Bao, Qiaoliang,Jahan, Maryam,Polavarapu, Lakshminarayana,Wei, Ji,Xu, Qing-Hua,Loh, Kian Ping
, p. 6549 - 6553 (2010)
A charge-transfer complex between graphene oxide (GO) and pyrene dye PNPB has been synthesized by a simple ion-exchange process. Its highly specific interactions with DNA compared to other biomolecules (see scheme) allows selective and rapid detection of DNA in biological mixtures. It also exhibits broadband optical limiting.
Molecular aggregation in a hemicyanine dye: Modeling by a combined crystallographic and computational approach
Chandra, M. Sharath,Radhakrishnan
, p. 77 - 103 (2003)
Molecular aggregation in hemicyanine dye molecules, a problem of fundamental relevance to their linear and nonlinear optical properties, is addressed through a novel approach based on crystal structure investigation combined with semiempirical quantum che
Positively charged styryl pyridine substituted Zn(ii) phthalocyanines for photodynamic therapy and photoantimicrobial chemotherapy: Effect of the number of charges
Babu, Balaji,Mack, John,Magadla, Aviwe,Nyokong, Tebello
supporting information, p. 9129 - 9136 (2021/07/14)
Cationic Zn phthalocyanine complexes were synthesized using Knoevenagel reaction starting from a Zn(ii) tetrakis(2-formylphenoxy)phthalocyanine (1) to form Zn(ii) tetrakis(1-butyl-4-(4-(tetraphenoxy)styryl)pyridin-1-ium) phthalocyanine (2) and Zn(ii) tetr
Structural analysis of mono-substituted N-butyl-pyridinium salts: in search of ionic liquids
Kelley, Steven P.,Smetana, Volodymyr,Mudring, Anja-Verena,Rogers, Robin D.
, p. 117 - 128 (2021/02/05)
Four mono-substituted N-butylpyridinium salts, 1-butyl-4-dimethylaminopyridinium chloride [b4dmapy]Cl, 1-butyl-4-methylpyridinium bromide [b4mpy]Br, 1-butyl-4-methylpyridinium hexafluorophosphate [b4mpy][PF6], and 1-butyl-3-methylpyridinium hexafluorophosphate [b3mpy][PF6] were synthesized and characterized using single crystal X-ray diffraction. The crystal structures were examined with the intent of identifying ion interactions leading to higher melting points of the halide salts with respect to the [PF6]– salts. The changes in hydrogen bonding, C–H???π, and van der Waals interactions have been analyzed with respect to anion, functional groups, and the symmetry of the cation to establish interdependence with the compound’s physicochemical properties. It has been observed that the cation–anion interactions are represented by highly directional hydrogen bonds and show strong preference to positions of interaction depending on the anion. The cations of the halide salts show strong tendency towards higher dimensional formations, while those of the [PF6]– salts prefer low dimensional assemblies both being based mainly on the weaker van der Waals interactions. These interactions depend on the shape of the cation but may offer certain structure-ordering rigidity accommodating variable anions.
Expansion of Azulenes as Nonbenzenoid Aromatic Compounds for C-H Activation: Rhodium- And Iridium-Catalyzed Oxidative Cyclization of Azulene Carboxylic Acids with Alkynes for the Synthesis of Azulenolactones and Benzoazulenes
Maeng, Chanyoung,Son, Jeong-Yu,Lee, Seung Cheol,Baek, Yonghyeon,Um, Kyusik,Han, Sang Hoon,Ko, Gi Hoon,Han, Gi Uk,Lee, Kyungsup,Lee, Kooyeon,Lee, Phil Ho
supporting information, p. 3824 - 3837 (2020/02/28)
Rhodium-catalyzed oxidative [4 + 2] cyclization reactions through the C-H activation of azulene carboxylic acids as nonbenzenoid aromatic compounds with symmetrical and unsymmetrical alkynes were developed under aerobic conditions, which produced azulenolactone derivatives with a wide substrate scope and excellent functional group tolerance. Interestingly, azulenic acids in reaction with alkynes underwent iridium-catalyzed [2 + 2 + 2] cyclization accompanied by decarboxylation to afford tetra(aryl)-substituted benzoazulene derivatives. The reactivity order for C-H activation reaction is greater toward azulene-6-carboxylic acid, azulene-1-carboxylic acid, and azulene-2-carboxylic acid. For the first time, the expansion of azulenes having directing group as nonbenzenoid aromatic compounds for C-H activation was successful, indicating that nonbenzenoid aromatic compounds can be used as good substrates for the C-H activation reaction. Therefore, the research area of C-H activation will certainly expand to nonbenzenoid aromatic compounds in future.
Correlation between lipophilicity of newly synthesized ionic liquids and selected: Fusarium genus growth rate
Vrane?, Milan,Tot, Aleksandar,?osi?, Jasenka,Papovi?, Sne?ana,Pani?, Jovana,Gad?uri?, Slobodan,Jankovi?, Nenad,Vrande?i?, Karolina
, p. 19189 - 19196 (2019/07/04)
The purpose of the present study was to examine the effectiveness of 23 different synthesized ionic liquids (ILs) on Fusarium culmorum and Fusarium oxysporum growth rate. The strategy of IL synthesis was a structural modification of ionic liquids through changing the polarity of imidazolium and pycolinium cations and replacing halide anions with well known antifungal anions (cinnamate, caffeate and mandelate). The findings clearly suggest that the type of alkyl chain on the cation is the most determining factor for IL toxicity. In order to examine how IL structure affects their toxicity towards Fusarium genus, lipophilic descriptor AlogP is calculated from density functional theory and correlated with Fusarium growth rate. All these results demonstrate the high level of the interdependency of lipophilicity and toxicity for investigated ILs towards the Fusarium genus. The data collected in this research suggest that the inhibitory influence of ILs is more pronounced in the case of F. oxysporum.
An efficient conversion of alcohols to alkyl bromides using pyridinium based ionic liquids: A green alternative to appel reaction
Das, Pranab J.,Das, Jupitara,Das, Dimpee
, p. 651 - 654 (2018/02/09)
Pyridinium based ionic liquids namely 4-alkylpyridinium bromides were prepared and used for the conversion of alcohols to alkyl bromides in the presence of p-toluenesulphonic acid in the absence of volatile organic compounds. This solvent free procedure promises to be a much improved and environmentally benign alternative to the Appel reaction.
Gold-Catalyzed Direct Alkynylation of Azulenes
Székely, Anna,Péter, áron,Aradi, Klára,Tolnai, Gergely L.,Novák, Zoltán
supporting information, p. 954 - 957 (2017/02/26)
A novel catalytic method for the direct C-H alkynylation of azulenes is developed. The gold catalyzed functionalization of this special carbacycle is achieved with hypervalent iodonium reagent TIPS-EBX under mild reaction conditions. With the aid of the developed procedure, several TIPS alkynylated azulene derivatives were synthesized bearing important functional groups for further functionalization.
Selective O-methylation of phenols and benzyl alcohols in simple pyridinium based ionic liquids
Das, Pranab Jyoti,Das, Jupitara
, p. 94 - 98 (2015/06/08)
Synthesis of pyridinium based ionic liquids were reported and applied as catalyst for the selective O-methylation of phenols and benzyl alcohols. The reactions were carried out by using dimethylcarbonate (DMC) as the methylating agent. High selectivity, high yield and recyclability of the ionic liquids are important features of the reactions.
