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孫翠翠521銀蟲 (初入文壇)
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[求助]
求翻譯 急急急
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| 聚硅烷中相鄰的Si—Si間充滿的σ分子軌道如同共軛烯烴的π鍵一般相互交疊,形成能帶,引起電子沿著分子鏈軸方向離域,形成一個大的σ共軛體系.雖然碳與硅同屬一族,都能形成主鏈由一種元素組成的鏈狀大分子,但碳鏈的σ鍵屬定域鍵,要使其電子由基態(tài)躍遷到激發(fā)態(tài)需要很高的能量;而硅鏈聚合物因主鏈上原子半徑增大而使鍵易極化,硅原子又具有3d電子空軌道,所以電子能在主鏈廣泛離域,易于發(fā)生3d軌道的σ-σ* 躍遷,從而強烈地影響了其光電特性,使得聚硅烷成為一類新穎的光電材料. |

銀蟲 (初入文壇)

銀蟲 (初入文壇)

捐助貴賓 (著名寫手)
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聚硅烷 中 相鄰的 Si—Si間 充滿的 σ分子軌道 如同 共軛烯烴 的π鍵 一般 相互交疊,形成能帶,引起 電子 沿著 分子鏈軸方向 離域,形成 一個大的 σ共軛 體系. Being fully distributed between adjacent Si—Si of polysilane, σ molecular orbitals act just like the overlapping π bonds of conjugate alkenes, which will lead to the formation of energy band and the electrons delocalization along the molecular chain axis, thus forming a large σ conjugated system. 雖然 碳與硅 同屬一族,都能 形成 主鏈 由一種元素 組成的 鏈狀大分子,但 碳鏈的σ 鍵 屬 定域鍵,要使 其電子 由基態(tài) 躍遷到 激發(fā)態(tài) 需要 很高的能量;而 硅鏈 聚合物 因 主鏈上 原子半徑 增大 而 使 鍵 易 極化,硅原子 又具有 3d電子空軌道,所以 電 子 能在 主鏈 廣泛離域,易于 發(fā)生 3d軌道的 σ-σ* 躍遷,從而 強烈地 影響了 其光 電特性,使得 聚硅烷 成為 一類 新穎的 光電材料. Although carbon and silicon belong to the same group,and both element can form the chain macromolecule of which the backbone is constructed by the same single elements. However, the σbone of carbon chain is a kind of localized band, so very high energy is needed to stimulate electrons jumping from ground state to excited state; while for the silicone polymer, due to the increase of radius of atom on main chain that may enlarge the likelihood of bond polarization, as well as the 3D electronic empty orbital possessed by silicon atom, it can easily occur an extensive delocalization of electrons and 3D orbital σ-σ* transition, thus greatly affecting the optical-electrical characteristic of polysilane, and making it become a new-type of photoelectric material. |
銀蟲 (初入文壇)

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