Search results for "epäorgaaniset yhdisteet"
showing 3 items of 3 documents
Preparation and Characterization of P2 BCh Ring Systems (Ch=S, Se) and Their Reactivity with N-Heterocyclic Carbenes
2018
Four-membered rings with a P2BCh core (Ch = S, Se) have been synthesized via reaction of phosphinidene chalcogenide (Ar*P=Ch) and phosphaborene (Mes*P=BNR2). The mechanistic pathways towards these rings are explained by detailed computational work that confirmed the preference for the formation of P–P, not P–B, bonded systems, which seems counterintuitive given that both phosphorus atoms contain bulky ligands. The reactivity of the newly synthesized heterocycles, as well as that of the known (RPCh)n rings (n = 2, 3), was probed by the addition of Nheterocyclic carbenes, which revealed that all investigated compounds can act as sources of low-coordinate phosphorus species. peerReviewed
Inter-laboratory differences in the apparent quantum yield for the photochemical production of dissolved inorganic carbon in inland waters and implic…
2022
Solar radiation initiates photochemical oxidation of dissolved organic carbon (DOC) to dissolved inorganic carbon (DIC) in inland waters, contributing to their carbon dioxide emissions to the atmosphere. Models can determine photochemical DIC production over large spatiotemporal scales and assess its role in aquatic C cycling. The apparent quantum yield (AQY) spectrum for photochemical DIC production, defined as mol DIC produced per mol chromophoric dissolved organic matter-absorbed photons, is a critical model parameter. In previous studies, the principle for the determination of AQY spectra is the same but methodological specifics differ, and the extent to which these differences influenc…
Thiazyl radicals and their derivatives
2017
Tiatsyylit ovat orgaanisia radikaaleja, joilla on samanlaisia fysikaalisia ominaisuuksia, joita tavallisesti esiintyy epäorgaanisilla yhdisteillä ja metallioksideilla. Tiatsyylien sähköä johtavat ja magneettiset ominaisuudet ovat kiinnittäneet huomiota niiden löytymisestä lähtien ja niitä on hyödynnetty molekulaaristen magneettien ja johteiden suunnittelussa. Tämän lisäksi tietyillä tiatsyyleillä esiintyy bistabiilisuutta, joka tarkoittaa, että radikaalilla on kaksi erilaista magneettista olomuotoa riippuen kiinteän tilan pakkautumisesta. Bistabiilisuutta voidaan hyödyntää esimerkiksi molekyylikytkimissä. Uusin tutkimuksen haara on tiatsyylien koordinoiminen siirtymämetalleihin, joka lisää …