Table 2.
Photoinduced Cu‐catalyzed ATRP of MMA using CDs in different experimental conditions[a] exposed at 405 nm.
|
Entry |
CD |
[MMA]/[EBPA]/[CuBr2]/[TPMA] |
t [h] |
Conv. [%] |
M n,th [kDa] |
M n,GPC [kDa] |
Đ |
|---|---|---|---|---|---|---|---|
|
1 |
CD‐1 |
300/1/0/0.135 |
24 |
0 |
|
|
|
|
2 |
CD‐1 |
300/0/0.03/0.135 |
24 |
0 |
|
|
|
|
3[b] |
CD‐1 |
300/1/0.03/0.135 |
48 |
0 |
|
|
|
|
4 |
CD‐1 |
300/1/0.03/0.135 |
24 |
35.3 |
10.7 |
12.8 |
1.10 |
|
5 |
CD‐1 |
300/1/0.00/0.135 |
24 |
0 |
|
|
|
|
6 |
CD‐2 |
300/1/0.03/0.135 |
24 |
0 |
|
|
|
|
7 |
CD‐2 |
300/1/0.00/0.135 |
24 |
0 |
|
|
|
|
8 |
CD‐3 |
300/1/0.03/0.135 |
24 |
<3 |
10.9 |
9.7 |
1.14 |
|
9 |
CD‐3 |
300/1/0.00/0.135 |
24 |
83 |
|
240 |
|
|
10 |
CD‐4 [27] |
300/1/0.03/0.135 |
0.5 |
5.5 |
10.9 |
23.0 |
1.30 |
|
11 |
CD‐4 |
300/1/0.00/0.135 |
1 |
<1 |
|
500 |
2.40 |
|
12 |
CD‐5 |
300/1/0.03/0.135 |
24 |
0 |
|
|
|
|
13 |
CD‐5 |
300/1/0.00/0.135 |
24 |
0 |
[a] Reactions were conducted in 50 vol % DMSO, mCDs=3 mg, and irradiated under blue light LED (λ=405 nm, 100 mW cm−2). Conversion was calculated gravimetrically. Theoretical molecular weight (M n,th) values were calculated based on conversions M n,th=MEBPA+ [MMA]/[EBPA]×conversion×MMMA. Number‐average molecular weight (M n) and disperty (Đ) were obtained by gel permeation chromatography (GPC) in THF based on poly(methyl methacrylate) standards. [b] Reaction was kept in the dark.