90914-09-3Relevant articles and documents
Onium salt organic catalyst, and preparation method and application thereof
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Paragraph 0053-0055, (2021/05/19)
The invention discloses an onium salt organic catalyst. The catalyst has a structure as shown in a formula (I). In the formula (I), L is a urea or thiourea group; M is an onium salt structure with charges; y represents the number of urea or thiourea groups and can be any integer between 1 and 100000; and z represents the number of onium salt groups and can be any integer between 1 and 100000. The invention also discloses a preparation method of the onium salt organic catalyst. The preparation method comprises the following steps: mixing and stirring any reaction raw material W1 and any reaction raw material W2 in a solution, stirring at room temperature for 1-500 hours, and removing impurities and an organic solvent to obtain the onium salt organic catalyst. The invention also discloses an application of the onium salt organic catalyst in preparation of organic micromolecular and macromolecular polymers. The onium salt organic catalyst provided by the invention has the advantages of being easy to weigh, high in catalytic activity, controllable in reaction and the like; and the preparation method provided by the invention is simple and high in yield.
Novel EDTA-ligands containing an integral perylene bisimide (PBI) core as an optical reporter unit
Marcia, Mario,Singh, Prabhpreet,Hauke, Frank,Maggini, Michele,Hirsch, Andreas
supporting information, p. 7045 - 7058 (2014/09/29)
The synthesis, characterization and metal complexation of a new class of perylene bisimides (PBIs) as an integral part of ethylenediaminetetraacetic acid (EDTA) are reported. The simplest representative, namely derivative 1a, was synthesized both by a convergent as well as a direct approach while the elongated derivatives, 1b and 1c, were obtained only via a convergent synthetic pathway. All these new prototypes of water-soluble perylenes are bolaamphiphiles and were fully characterized by 1H- and 13C-NMR spectroscopy, matrix assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry and IR spectroscopy. In order to acquaint ourselves with the behaviour in solution of our PBIs bearing dendritic wedges, the simplest derivative, 1a, was chosen and tested by means of UV/Vis and fluorescence spectroscopy as well as by zeta-potential measurements. A photoexcitation induced intramolecular photo-electron transfer (PET) can be observed in these molecules. Therefore their potential applications as sensors can be imagined. Model compound 1a efficiently coordinates trivalent metal cations both in water and dimethyl sulfoxide (DMSO). Significantly, the effects of the complexation strongly depend on the aggregation state of the PBI molecules in solution. As a matter of fact, in water, the presence of M 3+ ions triggers the formation of light emitting supramolecular aggregates (excimers). On the other hand, in DMSO-rich solutions metal complexation leads to the suppression of the PET and leads to a strong fluorescence enhancement. This journal is the Partner Organisations 2014.
NOVEL POLYAMINE DERIVATIVES
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Page/Page column 13-14, (2009/09/26)
A compound having the general formula (I) or a pharmacologically acceptable salt thereof: ????????X-NH-Y-NH-R1?????(I) [wherein X represents R2-SO2- in which R2 represents an optionally substituted lower alkyl group or phenyl group; Y represents a group selected from the group consisting of -R3-NH-R4-, -R5-NH-R6-NH-R7-, -R8-NH-R9-NH-R10-NH-R11- and -R12-NH-R13-NH-R14-NH-R15- in which R3 to R15 each independently represent a C3 to C5 alkylene group; and R1 represents hydrogen or an optionally substituted lower alkyl group, with the proviso that the case where X represents a tosyl group, Y represents -(CH2)3-NH-(CH2)4-NH-(CH2)3- and R1 represents hydrogen is excepted].
