Table 1 Degradation rate (\(\beta\)), half-lives (\({t}_{1/2}\)) and destruction cross section (\(\upsigma\)) for pure phthalic acid, along with vibrational mode assignment indicating in bold the main vibration.
Band (cm−1) | Phthalic acid vibrational mode | \(\beta\, [{\text{s}}^{-1}]\) | \({t}_{1/2}\, \left[{\text{sol}}\right]\) Patel et al. (2002) flux | \({t}_{1/2} \,[{\text{sol}}]\) Jezero crater flux | \(\sigma \,[{\text{cm}}^{2}]\) |
|---|---|---|---|---|---|
4046 | Combination C=O stretching + COO-H in-plane bending + ring C–H in-plane bending | \(\left(1.1\pm 0.5\right)\times {10}^{-2}\) | \(0.3\pm 0.1\) | \(0.4\pm 0.2\) | \(\left(4\pm 2\right)\times {10}^{-20}\) |
2423 | Combination ring C–H in-plane bending + COOH bending | \(\left(6\pm 3\right)\times {10}^{-4}\) | \(5\pm 3\) | \(7\pm 4\) | \(\left(2\pm 1\right)\times {10}^{-21}\) |
1969 | 1st overtone ring C–H out-of-plane bending and ring C–C out-of-plane bending | \(\left(8\pm 1\right)\times {10}^{-4}\) | \(4\pm 1\) | \(5\pm 1\) | \(\left(2.8\pm 0.5\right)\times {10}^{-21}\) |
1693 | Fundamental carboxyl C=O stretching | \(\left(8\pm 2\right)\times {10}^{-3}\) | \(0.4\pm 0.1\) | \(0.5\pm 0.2\) | \(\left(3\pm 1\right)\times {10}^{-20}\) |
1275 | Fundamental carboxyl C–O stretching | \(\left(4.4\pm 0.8\right)\times {10}^{-3}\) | \(0.7\pm 0.1\) | \(0.9\pm 0.2\) | \(\left(1.6\pm 0.3\right)\times {10}^{-20}\) |
1213 | Combination COOH bending + ring C–H and C–C out-of-plane bending | \(\left(1.8\pm 0.4\right)\times {10}^{-3}\) | \(1.8\pm 0.4\) | \(2.3\pm 0.5\) | \(\left(7\pm 1\right)\times {10}^{-21}\) |
1155 | Fundamental ring C–H bending | \(\left(1.3\pm 0.4\right)\times {10}^{-4}\) | \(24\pm 8\) | \(30\pm 10\) | \(\left(5\pm 2\right)\times {10}^{-22}\) |
1142 | Fundamental ring C–H in-plane bending | \(\left(2.4\pm 0.5\right)\times {10}^{-4}\) | \(13\pm 3\) | \(17\pm 3\) | \(\left(9\pm 2\right)\times {10}^{-22}\) |
1111 | Fundamental ring C–H in-plane bending | \(\left(2\pm 1\right)\times {10}^{-4}\) | \(15\pm 8\) | \(20\pm 10\) | \(\left(7\pm 4\right)\times {10}^{-22}\) |
1074 | Fundamental ring C–C in-plane bending | \(\left(3.3\pm 0.7\right)\times {10}^{-4}\) | \(9\pm 2\) | \(12\pm 3\) | \(\left(1.2\pm 0.2\right)\times {10}^{-21}\) |
1007 | Fundamental ring C–H out-of-plane bending | \(\left(3.3\pm 0.8\right)\times {10}^{-4}\) | \(9\pm 2\) | \(13\pm 3\) | \(\left(1.2\pm 0.3\right)\times {10}^{-21}\) |
974 | Fundamental ring C–H out-of-plane bending | \(\left(3\pm 1\right)\times {10}^{-4}\) | \(10\pm 4\) | \(14\pm 5\) | \(\left(1.1\pm 0.4\right)\times {10}^{-21}\) |
800 | Fundamental ring C–H and C–C out-of-plane bending | \(\left(5\pm 2\right)\times {10}^{-4}\) | \(6\pm 3\) | \(8\pm 3\) | \(\left(2\pm 1\right)\times {10}^{-21}\) |
741 | Fundamental ring C–H out-of-plane bending | \(\left(2.0\pm 0.9\right)\times {10}^{-4}\) | \(15\pm 7\) | \(20\pm 7\) | \(\left(8\pm 3\right)\times {10}^{-22}\) |
