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yunzhijun112木蟲 (著名寫手)
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[求助]
求助論文翻譯,化學(xué)方面的
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| 金屬卟啉在紫外可見區(qū)域具有特征吸收帶,依據(jù)Gouterman 的四軌道模型,對(duì)于D4h對(duì)稱性的金屬卟啉配合物,其最高占有軌道(HOMO)上有兩個(gè)能量接近的a1μ(π)和a2μ(π)能級(jí),最低空軌道(LUMO)上有一對(duì)簡(jiǎn)并的eg(π*)能級(jí),從a1μ(π)、a2μ(π)到eg(π*)產(chǎn)生兩個(gè)單激發(fā)的躍遷,在400 nm 左右的強(qiáng)吸收B帶源于a1μ(π) →eg(π*)躍遷,在500~600 nm 的弱吸收Q帶則源于a2μ(π)→eg(π*)躍遷,Q 帶包括α和β兩個(gè)吸收帶,α吸收帶位于高波長(zhǎng)處。由圖4可以看出,ZnPP-PS的B 、α和β吸收帶分別位于425,559,599nm處,與文獻(xiàn)[16]報(bào)道的小分子ZnPP的電子吸收光譜相似,這說明ZnPP被高分子化后,所形成的金屬卟啉功能化聚合物ZnPP-PS保留了小分子ZnPP的光譜性能。 |

鐵桿木蟲 (著名寫手)
Farmer

鐵桿木蟲 (著名寫手)
Farmer
| Metalloporphyrin has characteristic absorption bands in the UV-vis region. And according to the Gouterman four orbital model, the D4h symmetric metalloporphyrin has two energy close a1μ(π) and a2μ(π) levels on the high occupied molecular obital (HOMO), and a couple of degenerated eg(π*) levels on the low unoccupied molecular orbital(LUMO). The transitions from a1μ(π)、a2μ(π) to eg(π*) will generate two single excitation transitions. The strong absorption band B at ca. 400 nm is due to a1μ(π) →eg(π*) transition, and the weak absorption band Q at ca. 500~600 nm is due to a2μ(π)→eg(π*) transition. The Q band includes αand βabsorption bands with the former lying at the higher wavelength. It can be seen from Fig. 5 that the B、α和βabsorption bands of ZnPP-PS are at 425,559,599 nm, respectively, which is in well agreement with the electron absorption spectroscopy of the small molecule ZnPP reported in Ref. [16]. This demonstrates that the functional mtalloporphyrin polymer ZnPP-PS formed by the polymerization of ZnPP maintained (reserved) the spectroscopic properties of the small molecule ZnPP. |

木蟲 (著名寫手)

鐵桿木蟲 (著名寫手)
Farmer

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