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. 2015 Mar 5;6(5):2979–2988. doi: 10.1039/c5sc00477b

Table 1. Visible light-initiated LRP of acrylates and acrylamides using I as both initiator and mediator at ambient temperature a .

Entry Monomer (equiv.) Condition b t (h) Conv. c (%) M n,th d M n,GPC e M w/M n e
1 MA (600) Xe lamp 92 74 38 700 38 900 1.14
2 MA (600) CFL 72 67 35 300 37 300 1.09
3 nBA (600) Xe lamp 72 81 62 900 64 200 1.23
4 nBA (600) CFL 72 88 68 300 71 700 1.23
5 tBA (600) Xe lamp 24 73 56 800 55 000 1.11
6 tBA (600) CFL 24 73 56 800 57 900 1.15
7 f tBA (600) Dark 36 0
8 f DMA (600) Dark 48 0
9 DMA (600) Xe lamp 12 76 45 800 41 200 1.16
10 DMA (600) CFL 12 79 47 600 43 100 1.16
11 DEA (600) Xe lamp 4 71 54 100 57 200 1.22
12 DEA (600) CFL 4 70 54 800 55 900 1.19
13 DEA (600) Sunlight 4 42 32 400 35 600 1.23
14 AMO (200) Xe lamp 12 84 24 400 20 700 1.12
15 AMO (200) CFL 12 88 25 400 21 100 1.13

a[M]0 = 1.0 M in benzene-d 6.

bA 500 W Xe lamp was used as the light source with a 420–780 nm filter, and the light intensity was 3 mW cm–2; a household CFL (compact fluorescent lamp, 27 W) was used as the light source, the light intensity was 3–5 mW cm–2 at the sample position; sunlight was used as the light source, and the sample was placed in a water bath at ambient temperature.

cThe monomer conversion was determined based on the 1H NMR spectra.

d M n,th = M w( I ) + M w(Monomer) × ratio × conv. (%), where ratio refers to the ratio of monomer to I.

eDetermined using gel permeation chromatography in DMF, calibrated against poly(methyl methacrylate) standards.

fSample was protected from light with aluminum foil.