Table 2.
Characteristic Fourier transform infrared bands for ZnOSM20(−), ZnOSM20(+), ZnOAE100(−), and ZnOAE100(+)
| Assignments | ZnOSM20(−) | ZnOSM20(+) | ZnOAE100(−) | ZnOAE100(+) | References |
|---|---|---|---|---|---|
| ν(OH) | 3,700–3,000 | 3,700–3,000 | 3,700–3,000 | 3,700–3,000 | 22,30 |
| δasym(NH3+) | 1,656 (s) | 1,656 (s) | 31 | ||
| δ(OH) | 1,640 (vs) | 1,636 (sh) | 1,640 (vs) | 1,636 (sh) | 30 |
| νasym(COO−) | 1,564 (s) | 1,601 (vs) | 1,556 (s) | 1,601 (vs) | 31,32 |
| δ(CH2) | 1,460 (s) | 1,456 (s) | 1,456 (w) | 1,456 (s) | 31,32 |
| νsym(COO−) | 1,408 (vs) | 1,420 (s) | 1,410 (vs) | 1,421 (s) | 30,32 |
| ω(CH2) | 1,394 (vs) | 1,396 (vs) | 31 | ||
| δ(COH) | 1,208 (w) | 1,206 (w) | 31 | ||
| γ(NH3+) | 1,120 (s) | 1,120 (s) | 31 | ||
| ν(CO) | 1,096 (vs) | 1,096 (vs) | 31 | ||
| ν(ZnO) | ∼490 (vs) | ∼490 (vs) | ∼490 (vs) | ∼490 (vs) | 22,30 |
Abbreviations: vs, very strong; s, strong; w, weak; sh, shoulder; ν, bond stretching; δ, bending; ω, wagging; γ, rocking (out of plane); asym, asymmetric; sym, symmetric.