24小时热门版块排行榜    

Znn3bq.jpeg
查看: 2171  |  回复: 9
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

zhangkun232

至尊木虫 (著名写手)

[交流] 贵金属纳米团簇的分子发光机制 已有2人参与

金属纳米团簇的发光一直以来存在非常大的争议,有两个核心机制:贵金属纳米团簇的量子尺寸限域效应和表面配体主导的空间电子效应,越来越多的证据证明表面配体对发光的调控起到决定性作用,但是发光的中心是表面的保护性配体还是其它吸附的化学组分。结合各种稳态谱学以及飞秒超快技术,我们在国际上率先提出了,贵金属纳米团簇的发光中心来源于界面吸附的结构水分子,这正结构水分子不同于传统的氢键水分子,并且提出了拓扑激发的概念。论文发表在Nanoscale(Nanoscale, 2021,13, 15058-15066;DOI        https://doi.org/10.1039/D1NR02389F)上,欢迎大家留言讨论。文章链接如下:https://pubs.rsc.org/en/content/articlelanding/2021/nr/d1nr02389f
Caged structural water molecules emit tunable brighter colors by topological excitation†

bstract
Intrinsically, free water molecules are a colourless liquid. If it is colourful, why and how does it emit the bright colours? We provided direct evidence that when water was trapped into the sub-nanospace of zeolites, the structural water molecules (SWs) exhibited strong tunable photoluminescence (PL) emissions from blue to red colours with unprecedented ultra-long lifetimes up to the second scale at liquid nitrogen temperature. Further controlled experiments and combined characterizations by time-resolved steady-state and ultra-fast femtosecond (fs) transient optical spectroscopy showed that the singly adsorbed hydrated hydroxide complex {OH−·H2O} as SWs in the confined nanocavity is the true emitter centre, whose PL efficiency strongly depends on the type and stability of the SWs, which is dominated by H-bond interactions, such as the solvent effect, pH value and operating temperature. The emission of SWs exhibits the characteristic of topological excitations (TAs) due to the many-body quantum electron correlations in confined nanocavities, which differs from the local excitation of organic chromophores. Our model not only elucidates the origin of the PL of metal nanoclusters (NCs), but also provides a completely new insight to understand the nature of heterogeneous catalysis and interface bonding (or state) at the molecule level, beyond the metal-centred d band theory.
回复此楼
简简单单生活,快快乐乐追求自己的梦想!
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

willbuilder

铁杆木虫 (著名写手)


小木虫: 金币+0.5, 给个红包,谢谢回帖
lz传份论文到researchgate好吗?
博观约取,厚积薄发
3楼2021-09-21 07:06:26
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 10 个回答

zhangkun232

至尊木虫 (著名写手)

简简单单生活,快快乐乐追求自己的梦想!
2楼2021-09-19 21:22:48
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

zhangkun232

至尊木虫 (著名写手)

最新的研究进展,尤其是关于双金属纳米团簇的发光机制:链接如下:
https://www.frontiersin.org/arti ... em.2021.756993/full
简简单单生活,快快乐乐追求自己的梦想!
4楼2021-09-27 18:51:31
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

susanf

金虫 (小有名气)


小木虫: 金币+0.5, 给个红包,谢谢回帖
全新的角度理解贵金属纳米团簇的发光机制,收益!
5楼2021-10-26 15:34:10
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 085801电气专硕272求调剂 +19 电气李 2026-04-13 21/1050 2026-04-15 13:37 by 黑科技矿业
[考研] 297工科调剂? +14 河南农业大学-能 2026-04-13 15/750 2026-04-15 13:25 by 黑科技矿业
[考研] 一志愿中国科学院上海有机所,有机化学356分找调剂 +12 Nadiums 2026-04-09 13/650 2026-04-14 17:54 by lhj2009
[考研] 26药学专硕105500求调剂 +6 喽哈加油 2026-04-13 6/300 2026-04-14 16:40 by zhouxiaoyu
[考研] 335求调剂 +19 想上岸呀!! 2026-04-12 21/1050 2026-04-14 16:23 by Art1977
[考研] 药学305求调剂 +10 玛卡巴卡boom 2026-04-10 10/500 2026-04-14 15:55 by zs92450
[基金申请] RY:中国产出的科学垃圾论文,绝对数量和比例都世界第一 +6 zju2000 2026-04-14 17/850 2026-04-14 14:34 by jurkat.1640
[基金申请] 有爆料,一个青年教师卖房得400万,然后换了一个四青帽子 +11 babu2015 2026-04-08 11/550 2026-04-13 16:33 by probebill
[考研] 339求调剂 +4 hanwudada 2026-04-12 4/200 2026-04-13 12:03 by 蓝云思雨
[考研] 求调剂288 +7 ioodiiij 2026-04-10 9/450 2026-04-13 08:33 by Hayaay
[考研] 一志愿0807 数一英一 313 有没有二轮调剂 +12 emokidd 2026-04-08 13/650 2026-04-13 08:32 by lhj2009
[考研] 本科南方医科大学 一志愿985 药学学硕284分 求调剂 +5 弱水听文 2026-04-09 5/250 2026-04-12 13:16 by shengxi123
[考研] 326求调剂 +6 Shansyn 2026-04-10 6/300 2026-04-12 09:46 by hammer3
[考研] 求调剂,一志愿材料科学与工程985,365分, +8 材化李可 2026-04-11 10/500 2026-04-12 08:42 by 852137818
[考研] 一志愿西北工业大学289 085602 +33 yang婷 2026-04-10 34/1700 2026-04-12 08:11 by Art1977
[考研] 一志愿郑州大学 22408 305分求调剂 +5 安小满zzz 2026-04-08 5/250 2026-04-12 00:41 by 蓝云思雨
[考研] 331求调剂 +5 王国帅 2026-04-11 5/250 2026-04-11 22:56 by 溪涧流水
[考研] 材料与化工调剂 +12 否极泰来2026 2026-04-10 13/650 2026-04-11 00:28 by wangjihu
[考研] 考研调剂 +26 硕星赴 2026-04-09 27/1350 2026-04-10 22:24 by 猪会飞
[考研] 085800 能源动力求调剂 +6 阿biu啊啊啊啊啊 2026-04-10 6/300 2026-04-10 15:03 by hemengdong
信息提示
请填处理意见