| 查看: 691 | 回复: 2 | ||
| 【悬赏金币】回答本帖问题，作者阿洛啊将赠送您 10 个金币 | ||
[求助]
求帮助 求帮助 求帮助。。。。。。。。。。。。。 已有1人参与
|
||
| We report a nonparallel stacked arrangement of donor–acceptor (D–A) pairs for prolonging the lifetime of photoinduced charge-separated states. Hydrogen–hydrogen steric repulsion in naphthalimide-naphthalene (NIN) dyad destabilizes the planar geometry between the constituent units in solution/ground state. Sterically imposed nonplanar geometry of the dyad allows the access of nonparallel arrangement of the donor and acceptor stacks having triclinic space group in the crystalline state. Antiparallel trajectory of excitons in nonparallel D–A stacks can result in lower probability of geminate charge recombination, upon photoexcitation, thereby resulting in a long-lived charge-separated state. Upon photoexcitation of the NIN dyad, electron transfer from naphthalene to the singlet excited state of naphthalimide moiety results in radical ion pair intermediates that survive >10,000-fold longer in the aggregated state (τcra > 1.2 ns) as compared to that of monomeric dyad (τcrm < 110 fs), monitored using femtosecond transient absorption spectroscopy |
回复此楼» 猜你喜欢
071000生物学调剂求助
已经有14人回复
-
材料调剂
已经有9人回复
-
277求调剂
已经有19人回复
-
344求调剂
已经有6人回复
-
化工调剂求导师收留！一志愿失利，踏实肯干，有植物提取科研经历
已经有13人回复
-
一志愿西交机械专硕求调剂
已经有4人回复
-
277 数一104，学硕，求调剂
已经有14人回复
-
求调剂 材料与工程 324分 专硕
已经有17人回复
-
342电子信息专硕求调剂
已经有4人回复
-
0835学硕299求调剂 08大类可接受
已经有7人回复
mac194
铁虫 (职业作家)
- 应助: 128 (高中生)
- 金币: 21401.3
- 红花: 101
- 帖子: 3332
- 在线: 3370.2小时
- 虫号: 2488597
- 注册: 2013-05-30
- 专业: 高分子材料的加工与成型
2楼2015-12-14 05:14:27
3楼2015-12-14 10:47:43
