15535-95-2Relevant articles and documents
Monolayer nanosheets formed by liquid exfoliation of charge-assisted hydrogen-bonded frameworks
Nicks, Joshua,Boer, Stephanie A.,White, Nicholas G.,Foster, Jonathan A.
, p. 3322 - 3327 (2021)
Hydrogen-bonded organic frameworks (HOFs) are a diverse and tunable class of materials, but their potential as free-standing two-dimensional nanomaterials has yet to be explored. Here we report the self-assembly of two layered hydrogen-bonded frameworks based on strong, charge-assisted hydrogen-bonding between carboxylate and amidinium groups. Ultrasound-assisted liquid exfoliation of both materials readily produces monolayer hydrogen-bonded organic nanosheets (HONs) with micron-sized lateral dimensions. The HONs show remarkable stability and maintain their extended crystallinity and monolayer structures even after being suspended in water at 80 °C for three days. These systems also exhibit efficient fluorescence quenching of an organic dye in organic solvents, superior to the quenching ability of the bulk frameworks. We anticipate that this approach will provide a route towards a diverse new family of molecular two-dimensional materials.
NOVEL ETHYLENEDIAMINE DERIVATIVES
-
Page/Page column 130, (2010/02/14)
A compound represented by the following formula (1):Q-Q-T-N(R)-Q-N(R)-T-Q [wherein, R1 and R2 are hydrogen atoms or the like; Q1 is a saturated or unsaturated, 5- or 6- membered cyclic hydrocarbon group which may have a substituent, or the like; Q2 is a single bond or the like; Q3 represents the following group: -C(R3a)(R4a)-{C(R3b)(R4b)}m1-{C(R3c)(R4c)}m2-{C(R3d)(R4d)}m3-{C(R3e)(R4e)}m4-C(R3f)(R4f)- (in which, R3a to R4e represent hydrogen or the like); T0 represents a carbonyl group or the like; and T1 represents -COCONR- or the like]; or salt thereof, solvate thereof, or N-oxide thereof. The compound is useful as a preventive and/or therapeutic agent for cerebral infarction, cerebral embolism, myocardial infarction, angina pectoris, pulmonary infarction, pulmonary embolism, Buerger's disease, deep venous thrombosis, disseminated intravascular coagulation syndrome, thrombus formation after valve or joint replacement, thrombus formation and reocclusion after angioplasty, systemic inflammatory response syndrome (SIRS), multiple organ dysfunction syndrome (MODS), thrombus formation during extracorporeal circulation, or blood clotting upon blood drawing.