75867-46-8Relevant articles and documents
Structure Direction, Solvent Effects, and Anion Influences in Halogen-Bonded Adducts of 2,6-Bis(iodoethynyl)pyridine
Barry, Dawn E.,Hawes, Chris S.,Blasco, Salvador,Gunnlaugsson, Thorfinnur
, p. 5194 - 5205 (2016)
A new divergent and self-complementary halogen bond donor-acceptor molecule 2,6-bis(iodoethynyl)pyridine L has been prepared and structurally characterized, and used to generate a series of extended halogen-bonded adducts with tetrabutylammonium halide salts. The reaction between L and anions such as either bromide or chloride gives the one-dimensional polymeric species {L·TBABr} or {L·TBACl}, respectively, which contains helical strands linked by C-I···X- halogen bonds which partially encapsulate the associated organic cations. Varying the reaction solvent from ethyl acetate to 5:95 methanol/ethyl acetate gives rise to another polymeric phase on combining L with tetrabutylammonium chloride, the one-dimensional looped chain structure {L2·TBACl} in which each chloride ion acts as a four-connected square planar node for halogen bonding interactions originating from L. Similar solvent effects are observed in the discrete macrocyclic species {L·TBAI}-α and {L·TBAI}-β, both consisting of cyclic (L2I2)2- species which vary in their extended structures to adopt different packing modes, resembling those observed in the chloride and bromide adducts. Reaction of L with tetrabutylammonium fluoride in the presence of methanol gives a one-dimensional polymeric assembly {L2·TBAF·MeOH} containing a unique MeOH···F- node in which the strongly hydrogen-bonded anionic species is supported solely by four halogen bonding interactions. Excluding hydrogen bond donors from the reaction mixture affords {L3TBAF2}, an overall two-dimensional polymeric assembly consisting of a mixture of one- and two-dimensional networks based on iodine-fluoride halogen bonds. In all cases, the strong interactions between the iodoethynyl groups and halide anions overcome the tendency for L to form the self-complementary halogen-bonded network, showing that synthetically accessible heterocyclic iodoethynyl compounds present exciting new directions in the structural chemistry field.
A pyrene-pyridyl nanooligomer as a methoxy-triggered reactive probe for highly specific fluorescence assaying of hypochlorite
He, Xiaoxiao,Huang, Hongmei,Huang, Jiyan,Mao, Wensheng,Wang, Kemin,Xiao, Yi,Yang, Ronghua,Zhang, Li,Zhang, Youyu
, p. 2520 - 2523 (2022/03/02)
A novel pyrene-pyridyl conjugated oligomer (OPP-OMe) was conveniently prepared by one-pot Sonogashira coupling. Intriguingly, it was found that introducing only one methoxy moiety at the 4-pyridyl position can be sufficient for creating an oligomer-based ultrafine reactive fluorescent nanoprobe, i.e., OPP-OMe NPs (ca. 2.5 nm in diameter). Spectral analyses and elucidation of the intermediate structure revealed that the methoxy triggered-oxidation, together with nanoaggregation of OPP-OMe NPs, results in rapid, specific and supersensitive sensing of hypochlorite (LOD, 0.3 nM, S/N = 3).
Distinct photodynamics of κ-N and κ-C pseudoisomeric iron(ii) complexes
Dierks, Philipp,Kruse, Ayla,Bokareva, Olga S.,Al-Marri, Mohammed J.,Kalmbach, Jens,Baltrun, Marc,Neuba, Adam,Schoch, Roland,Hohloch, Stephan,Heinze, Katja,Seitz, Michael,Kühn, Oliver,Lochbrunner, Stefan,Bauer, Matthias
supporting information, p. 6640 - 6643 (2021/07/12)
Two closely related FeIIcomplexes with 2,6-bis(1-ethyl-1H-1,2,3-triazol-4yl)pyridine and 2,6-bis(1,2,3-triazol-5-ylidene)pyridine ligands are presented to gain new insights into the photophysics of bis(tridentate) iron(ii) complexes. The [Fe(N^N^N)2]2+pseudoisomer sensitizes singlet oxygen through a MC state with nanosecond lifetime after MLCT excitation, while the bis(tridentate) [Fe(C^N^C)2]2+pseudoisomer possesses a similar3MLCT lifetime as the tris(bidentate) [Fe(C^C)2(N^N)]2+complexes with four mesoionic carbenes.
Synthesis of pyridine-bridged bisferrocene and its pH value adjustable photoelectric properties
Chen, Jiahui,Hou, Hong wei,Li, Gaiping,Ma, Jingjing,Shi, Weimin,Zhai, Yali,Zhang, Jianye,Zhou, Xiang
, (2020/03/04)
Four bisferrocenyl pyridine derivatives 2, 6-bis (ferrocenylethynyl) pyridine (3), 2, 6-bis (ferrocenylbutadiynyl) pyridine (8), 2, 6-bis (ferrocenylhexyltriynyl) pyridine (9), 2, 5-bis (ferrocenylbutadiynyl) pyridine (14) have been synthesized and photoe
Fine-Tuned Visible and Near-Infrared Luminescence on Self-Assembled Lanthanide-Organic Tetrahedral Cages with Triazole-Based Chelates
Wu, Shi-Yu,Guo, Xiao-Qing,Zhou, Li-Peng,Sun, Qing-Fu
supporting information, p. 7091 - 7098 (2019/05/22)
The construction of well-defined lanthanide complexes emitting in both the visible and near-infrared regions is of great importance due to their widespread applications in phosphors, light-emitting diodes, biosensors/probes, optical communications, etc. I
Conjugated polymer containing pyrene-pyridine groups and synthesis method and application thereof
-
Paragraph 0059-0061, (2019/12/25)
The invention discloses a conjugated polymer containing pyrene-pyridine groups as well as a synthesis method and application of the conjugated polymer. The conjugated polymer is shown as a formula I or a formula II, according to the synthesis method, a pyrene derivative and 2, 6-di (acetenyl) pyridine are used as monomers, and the conjugated polymer is synthesized through a Sonogashira condensation polymerization reaction. A method for preparing nanoparticles comprises the following steps: dissolving the conjugated polymer in a volatile solvent to obtain a conjugated polymer solution with theconcentration of 60-125ppm; and adding the conjugated polymer solution into a surfactant solution, carrying out ultrasonic treatment until the solution is clear, and filtering to obtain the product. The conjugated polymer belongs to a low polymer, is small in size and can be used for preparing nanoparticles with the particle size of less than 10nm; the average particle size of the obtained nano particles is smaller than 10 nm, and the nano particles are applied to the fields of metal ions, small organic molecules and cell imaging, so that the detection limit and sensitivity of a detection method are improved.
Functional organic click-materials: application in phosphorescent organic light emitting diodes
Kautny, Paul,Zhao, Chenyang,Kader, Thomas,St?ger, Berthold,Horkel, Ernst,Chen, Jiangshan,Ma, Dongge,Fr?hlich, Johannes,Lumpi, Daniel
, p. 12150 - 12160 (2017/03/08)
In the presented work click chemistry is utilized to introduce 1,2,3-triazoles as a functional linker in organic donor-acceptor materials. A systematic series of materials was prepared and characterized to investigate the effect of the linkage mode on the molecular properties. The 1,2,3-triazole linker allowed control of the degree of intramolecular charge transfer over a wide range depending on the substitution pattern of the triazole moiety. The prepared materials were successfully employed as host materials for green and red dopants in phosphorescent organic light emitting diodes. Thus, this work presents the first application of this novel linkage mode in the design and synthesis of functional π-conjugated organic donor-acceptor materials and their application in organic light emitting diodes.
AgI-directed triple-stranded helicates with meta-ethynylpyridine ligands
Li, Qiaolian,Huang, Fu,Fan, Yaxun,Wang, Yilin,Li, Jianfeng,He, Yujian,Jiang, Hua
, p. 3235 - 3244 (2015/04/27)
A series of triple-stranded complexes, [1a3Ag]BF4, [1b3Ag]BF4, [2a3Ag2](BF4)2, [2b3Ag2](BF4)2, and [33Ag3/
The exploration of hydrogen bonding properties of 2,6- and 3,5-diethynylpyridine by IR spectroscopy
Vojta, Danijela,Kova?evi?, Goran,Vazdar, Mario
supporting information, p. 1912 - 1923 (2015/03/30)
Hydrogen bonding properties of 2,6- and 3,5-diethynylpyridine were analyzed by exploring of their interactions with trimethylphosphate, as hydrogen bond acceptor, or phenol, as hydrogen bond donor, in tetrachloroethene C2Cl4. The employment of IR spectroscopy enabled unravelling of their interaction pattern as well as the determination of their association constants (Kc) and standard reaction enthalpies (ΔrHθ). The association of diethynylpyridines with trimethylphosphate in stoichiometry 1:1 is established through CH?O hydrogen bond, accompanied by the secondary interaction between CC moiety and CH3 group of trimethylphosphate. In the complexes with phenol, along with the expected OH?N interaction, CC?HO interaction is revealed. In contrast to 2,6-diethynylpyridine where the spatial arrangement of hydrogen bond accepting groups enables the simultaneous involvement of phenol OH group in both OH?N and OH?CC hydrogen bond, in the complex between phenol and 3,5-diethynylpyridine this is not possible. It is postulated that cooperativity effects, arisen from the certain type of resonance-assisted hydrogen bonds, contribute the stability gain of the latter. Associations of diethynylpyridines with trimethylphosphate are characterized as weak (Kc ≈0.8-0.9 mol-1 dm3; -ΔrHθ ≈5-8 kJ mol-1), while their complexes with phenol as medium strong (Kc ≈5 mol-1 dm3; -ΔrHθ ≈15-35 kJ mol-1). Experimental findings on the studied complexes are supported with the calculations conducted at B3LYP/6-311++G(d,p) level of theory in the gas phase. Two conformers of diethynylpyridine?trimethylphosphate dimers are formed via CH?O interaction, whereas dimers between phenol and diethynylpyridines are established through OH?N interaction.
Tuning the structural and photophysical properties of cationic Pt(II) complexes bearing neutral bis(triazolyl)pyridine ligands
Allampally, Naveen Kumar,Daniliuc, Constantin-Gabriel,Strassert, Cristian A.,De Cola, Luisa
, p. 1588 - 1596 (2015/06/23)
The emission properties of a series of cationic Pt(II) complexes bearing neutral tridentate 2,6-bis-(1H-1,2,3-triazol-5-yl)pyridine and monoanionic ancillary ligands (Cl- or CN-) are described. By varying the substitution pattern on
