4-(2-hydroxy-ethoxy)-benzoic acid butyl ester | 36457-18-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 4-(2-hydroxy-ethoxy)-benzoic acid butyl ester
• 英文别名: 4-(2-Hydroxy-aethoxy)-benzoesaeure-butylester；butyl 4-(2-hydroxyethoxy)benzoate
• CAS: 36457-18-8
• 化学式: C₁₃H₁₈O₄
• 分子量: 238.284
• InChiKey: UBPMFAHZCCDYCG-UHFFFAOYSA-N

物化性质

• 沸点：
  374.6±17.0 °C(Predicted)
• 密度：
  1.108±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.01
• 重原子数：
  17.0
• 可旋转键数：
  7.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  55.76
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为产物：
  描述：

  尼泊金丁酯 、 2-氯乙醇 在 氢氧化钾 作用下， 生成 4-(2-hydroxy-ethoxy)-benzoic acid butyl ester
  参考文献：
  名称：

  Negoro; Saeki, Kogyo Kagaku zasshi / Journal of the Society of Chemical Industry, 1956, vol. 59, p. 205,208

  摘要：

  DOI：

文献信息

• Ultrafast spectroscopy studies on the mechanism of electron transfer and energy conversion in the isolated pseudo ginseng, water hyacinth and spinach chloroplasts
  作者：Sichuan Xu、Zhaoyong Sun、Xicheng Ai、Juan Feng、Qiyuan Zhang、Xingkang Zhang、Fei Yu、Chongqin Tang、Liangbi Li、Tingyun Kuang

  DOI：10.1007/bf02879811

  日期：2001.8

  The spectroscopy characteristics and the fluorescence lifetime for the chloroplasts isolated from the pseudo ginseng, water hyacinth and spinach plant leaves have been studied by absorption spectra, low temperature steady-state fluorescence spectroscopy and single photon counting measurement under the same conditions and by the same methods. The similarity of the absorption spectra for the chloroplasts at room temperature suggests that different plants can efficiently absorb light of the same wavelength. The fluorescence decays in PS II measured at the natural Q(A) state for the chloroplasts have been fitted by a three-exponential kinetic model. The three fluorescence lifetimes are 30, 274 and 805 ps for the pseudo ginseng chloroplast; 138, 521 and 1494 ps for the water hyacinth chloroplast; 197, 465 and 1459 ps for the spinach chloroplast, respectively. The slow lifetime fluorescence component is assigned to a collection of associated light harvesting Chi a/b proteins, the fast lifetime component to the reaction center of PS II and the middle lifetime component to the delay fluorescence of recombination of P-680(+) and Pheo(-). The excitation energy conversion efficiency (eta) in PS II RC is defined and calculated on the basis of the 20 ps electron transfer time constant model, 60%, 87% and 91% for the pseudo ginseng, water hyacinth and spinach chloroplasts, respectively. This interesting result is In unconformity with what is assumed to be 100% efficiency in PS II RC. Our result in this work stands in line with the 20 ps electron transfer time constant in PS II rather sound and the water hyacinth plant grows slower than the spinach plant does as envisaged on the efficiency. But, our results predict that those plants can perform highly efficient transfer of photo-excitation energy from the light-harvesting pigment system to the reaction center (closely to 100%). The conclusion contained in this paper reveals the plant growth characteristics expressed in the primary processes of photosynthesis and a relationship between a plant growing rate and its spectroscopy characteristics and fluorescence lifetimes, namely, the slower a plant grows, the less excitation energy conversation efficiency used might be anticipated.