Results 31 to 40 of about 18,931 (242)
Crystal structure of 5,10,15-triphenyl-20-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)porphyrin
Acta Crystallographica Section E, 2014 In the title compound, C44H37BN4O2, the dihedral angle between the plane of the porphyrin macrocycle ring system [r.m.s. deviation = 0.159 (1) Å] and those of three phenyl rings are 66.11 (4), 74.75 (4) and 57.00 (4)°.
Mathias O. Senge, Hans-Georg Eckhardt
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Modification of Oligo- and Polylactides With Macrocyclic Fragments: Synthesis and Properties
Frontiers in Chemistry, 2019 Products of lactic acid polycondensation (poly- and oligolactic acids) are widely used as packaging materials, drug delivery agents, implants etc.
Olga A. Mostovaya +5 more
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Towards triptycene functionalization and triptycene-linked porphyrin arrays
Beilstein Journal of Organic Chemistry, 2020 Herein, 9,10-diethynyltriptycene is investigated for its use as a rigid isolating unit in the synthesis of multichromophoric arrays. Sonogashira cross-coupling conditions are utilized to attach various porphyrins and boron dipyrromethenes (BODIPYs) to ...
Gemma M. Locke +2 more
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Frontiers in Plant Science, 2016 Abscisic acid (ABA), a pivotal phytohormone that is synthesized in response to abiotic stresses and other environmental changes, induces various physiological responses. Heme, in its unbound form, has a positive signaling role in cell-cycle initiation in
Yuki Kobayashi, Kan Tanaka, Kan Tanaka
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A perspective on the redox properties of tetrapyrrole macrocycles.
Physical Chemistry, Chemical Physics - PCCP, 2021 Tetrapyrrole macrocycles serve a multitude of roles in biological systems, including oxygen transport by heme and light harvesting and charge separation by chlorophylls and bacteriochlorophylls.
J. Diers +5 more
semanticscholar +1 more source
, 2016 A divalent calix-tetrapyrrole Sm complex, {[(−CH2−)5]4-calix-tetrapyrrole}Sm(THF)[Li(THF)]2[Li(THF)2](μ3-Cl) (1), reacts with dinitrogen to reversibly form the labile dinuclear complex [{[(−CH2−)5]4-calix-tetrapyrrole}Sm[Li(THF)]3(μ3-Cl)]2(μ2-N2)·2THF (2)
Jingwen Guan (1788538) +3 more
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Frontiers in Microbiology, 2022 Cyanobacteria have attracted the attention of researchers because of their promising role as primary and secondary metabolites in functional food and drug design.
Kshetrimayum Birla Singh +2 more
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Nomenclature of tetrapyrroles [PDF]
European Journal of Biochemistry, 1987 In the revised recommendations two new trivial names (isobacteriochlorin and sirohydrochlorin) are defined. Isobacteriochlorin is 2,3,7,8‐tetrahydroporphyrin and is isomeric with bacteriochlorin. An example of an isobacteriochlorin is sirohydrochlorin, an intermediate in the biosynthesis of corrinoids. The names of linear tetrapyrroles are amended. The
openaire +1 more source
Supramolecular Enforcement of Planar Tetracoordinate Halides
Angewandte Chemie, EarlyView.A calix[4]pyrrolato‐indium scaffold preorganizes Li4 pockets that trap Cl−, Br−, and I− in strongly flattened to square‐planar tetracoordinate environments. Computations reveal low planarization energies for the heavier halides, while crystallography shows that their geometry is readily modulated by subtle supramolecular and packing effects ...
Jie Zhang, Avijit Maiti, Lutz Greb
wiley +2 more sources