Risiken und Nutzen von Kupfer im Licht neuer Erkenntnisse zur Kupferhomöostase

Romaña, Daniel López de; Olivares, Manuel; Uauy, Ricardo; Araya, Magdalena

doi:10.1016/j.permed.2013.09.004

Cited by 2 publications

(2 citation statements)

References 121 publications

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“…resulting in halide terminal polymer, P−Br. The process presented in Scheme exhibits a photocatalytic system requiring a concentration of Cu II complex on the ppm scale which would rule out the high loading with metal ions which is a problem for many applications . The absorption of Sens should not significantly change during the process since it is regenerated by successive electron transfer reactions.…”

Section: Methodsmentioning

confidence: 99%

“…Thep rocess presented in Scheme 2e xhibits ap hotocatalytic system requiring ac oncentration of Cu II complex on the ppm scale which would rule out the high loading with metal ions which is ap roblem for many applications. [19] Thea bsorption of Sens should not significantly change during the process since it is regenerated by successive electron transfer reactions.I ts hould also be noted that the system is stable at room temperature in the dark and the three components of the initiating systems are indispensable for the polymerization to occur. No polymer formation occurs in the absence of one or more components under our reaction conditions ( Table SI2 in the Supporting Information).…”

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confidence: 99%

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Near‐Infrared Sensitized Photoinduced Atom‐Transfer Radical Polymerization (ATRP) with a Copper(II) Catalyst Concentration in the ppm Range

et al. 2018

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NIR-sensitized photoinduced atom-transfer radical polymerization (ATRP) is possible by using ppm of Cu II /tris(2pyridylmethyl)amine (TPMA) as the catalyst, apolymethine as the photosensitizer,a nd a-bromophenylacetate as the alkyl halide initiator.A mong the polymethines investigated with cationic, zwitterionic,o ra nionic structures,o nly the zwitterionic 2 exhibited sensitization activity under NIR light at room temperature resulting in the formation of polymers with controlled molecular weight characteristics and functionalities. The barbital group placed at the meso-position of 2 caused the activity in this photo-ATRP framework. The chain-end fidelity of the polymers was confirmed by chain extension and block copolymerization experiments.T he polymerization system exhibits high photostability under NIR light exposure and irradiation dependency as demonstrated by light on/off experiments.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

Near‐Infrared Sensitized Photoinduced Atom‐Transfer Radical Polymerization (ATRP) with a Copper(II) Catalyst Concentration in the ppm Range

et al. 2018

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Nahinfrarot‐sensibilisierte photoinduzierte ATRP mit einer Kupfer(II)‐Katalysatorkonzentration im ppm‐Bereich

et al. 2018

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Eine NIR-sensibilisierte photoinduzierte radikalische Atomtransferpolymerisation (ATRP) gelingt mit [Cu II -(Tri(2-pyridylmethyl)amin)]Br 2 als Katalysator in ppm-Konzentrationen, einem Polymethin als Photosensibilisator und a-Bromphenylacetat als Alkylhalogenid-Initiator.U nter den untersuchten Polymethinen mit einer kationischen (1), zwitterionischen (2, 3)und anionischen (4)Struktur war lediglich 2 als Sensibilisator mit NIR-Licht bei Raumtemperatur geeignet, um Polymere mit kontrollierten Molekulargewichten und Funktionalitäten zu erhalten. Die Barbituratgruppe von 2 trägt maßgeblichz ur Aktivitäti nd ieser ATRP bei. Die Funktionsfähigkeit der Endgruppe des erhaltenen Polymers wurde mittels Kettenverlängerungs-und Blockcopolymerisationsexperimenten nachgewiesen. Das System ist sehr photostabil bei Bestrahlung mit NIR-Licht. Die Abhängigkeit von der verwendeten Strahlung wurde durch periodische Ein/Aus-Phasen während der Polymerisation gezeigt.

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Risiken und Nutzen von Kupfer im Licht neuer Erkenntnisse zur Kupferhomöostase

Cited by 2 publications

References 121 publications

Near‐Infrared Sensitized Photoinduced Atom‐Transfer Radical Polymerization (ATRP) with a Copper(II) Catalyst Concentration in the ppm Range

Near‐Infrared Sensitized Photoinduced Atom‐Transfer Radical Polymerization (ATRP) with a Copper(II) Catalyst Concentration in the ppm Range

Nahinfrarot‐sensibilisierte photoinduzierte ATRP mit einer Kupfer(II)‐Katalysatorkonzentration im ppm‐Bereich

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