Green-light ATRP that tolerates open air

Eosin Y plus a copper ATRP catalyst polymerizes OEOMA under green light in open vials, giving low dispersity even at 1000 rpm stirring.

Keep what you just learned

Save these 10 cards to your NoteFren library. Your first review starts right away, and each card links back to the study it came from.

What two catalysts make the dual system?

Eosin Y photoredox catalyst plus a copper ATRP catalyst.

What happens without the photoredox catalyst?

No OEOMA conversion by 1H NMR.

What Đ results if copper is omitted?

High dispersity, Đ = 4.30, despite 89% conversion.

What control did EY + CuBr2 + TPMA give?

88% conversion and Đ = 1.19.

How oxygen-tolerant is stirring in open vials?

Even 1000 rpm still gave Đ < 1.18.

How little EYH2 still worked?

7.5 μM (25 ppm vs monomer) with 80% conversion, Đ = 1.16.

Where does ring-opened EY absorb?

Maximum near 520 nm in PBS after deprotonation.

Which quenching path is thermodynamically preferred?

Oxidative quenching of 3EY* by Cu(II), ΔGet = −0.92 eV.

What is the reductive-quenching ΔGet estimate vs TPMA/Et3N?

About +0.13 eV (uphill).

Can polymerization be gated with light?

Yes—stop and resume by turning green light off and on.