| 查看: 1719 | 回复: 6 | ||||
| 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 | ||||
[交流]
[Nature]催化合成氨获研究进展 已有6人参与
|
||||
|
Title: Catalytic conversion of nitrogen to ammonia by an iron model complex Abstract: The reduction of nitrogen (N2) to ammonia (NH3) is a requisite transformation for life1. Although it is widely appreciated that the iron-rich cofactors of nitrogenase enzymes facilitate this transformation, how they do so remains poorly understood. A central element of debate has been the exact site or sites of N2 coordination and reduction. In synthetic inorganic chemistry, an early emphasis was placed on molybdenum8 because it was thought to be an essential element of nitrogenases3 and because it had been established that well-defined molybdenum model complexes could mediate the stoichiometric conversion of N2 to NH3 (ref. 9). This chemical transformation can be performed in a catalytic fashion by two well-defined molecular systems that feature molybdenum centres. However, it is now thought that iron is the only transition metal essential to all nitrogenases3, and recent biochemical and spectroscopic data have implicated iron instead of molybdenum as the site of N2 binding in the FeMo-cofactor. Here we describe a tris(phosphine)borane-supported iron complex that catalyses the reduction of N2 to NH3 under mild conditions, and in which more than 40 per cent of the proton and reducing equivalents are delivered to N2. Our results indicate that a single iron site may be capable of stabilizing the various NxHy intermediates generated during catalytic NH3 formation. Geometric tunability at iron imparted by a flexible iron–boron interaction in our model system seems to be important for efficient catalysis. We propose that the interstitial carbon atom recently assigned in the nitrogenase cofactor may have a similar role, perhaps by enabling a single iron site to mediate the enzymatic catalysis through a flexible iron–carbon interaction. 全文地址： http://www.nature.com/nature/jou ... ll/nature12435.html ![[Nature]催化合成氨获研究进展](https://muchongimg.xmcimg.com/data/bcs/2013/0905/w214h832300_1378346554_906.jpg#opennewwindow) nature12435-f1.jpg |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : nature12435.pdf
2013-09-05 10:02:55, 406.38 K
» 收录本帖的淘帖专辑推荐
 那些事 |
» 本帖已获得的红花（最新10朵）
zyhou» 猜你喜欢
淮北师范大学 化学与化工科学学院 电催化课题组还有1名硕士研究生招生名额
已经有0人回复
-
英文期刊求助
已经有3人回复
-
物理化学论文润色/翻译怎么收费?
已经有116人回复
-
化学相关硕士研究生招收调剂-湖北师范大学 （快来捡漏，最新调剂信息，过国家线即可）
已经有1人回复
-
河南理工大学化学化工学院招收学硕调剂生
已经有0人回复
-
黑龙江科技大学化工 环境工程调剂
已经有22人回复
-
莆田学院环境与生物工程学院资源与环境专硕（环境工程方向） 开放调剂招生
已经有13人回复
-
浙江海洋大学石油化工与环境学院招收工科调剂生（学硕、专硕均可，线上面试）
已经有0人回复
-
浙江海洋大学石油化工学院接收工科调剂（学硕、专硕均可，近期线上面试）
已经有8人回复
-
浙江海洋大学石油与天然气工程专业接收工科调剂（13日早上截止，线上面试）
已经有0人回复
-
考研调剂～湖南工程学院材料与化工学院
已经有0人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 甲醛常温催化氧化研究获进展
已经有66人回复
- 中国化学工程发展史上的四件大事
已经有15人回复
- 煤制烯烃工艺技术介绍(合集)
已经有200人回复
- 【讨论】国内做水煤气变换催化剂的课题组有哪些？
已经有5人回复
- 【求助】传统的合成氨催化剂在常温常压下能否产生氨气？
已经有11人回复
- 【分享】催化剂发展史概述
已经有42人回复
3楼2013-09-06 20:46:10
zyhou
专家顾问 (文坛精英)
-
专家经验: +3748 - C-EPI: 74
- 应助: 4970 (副教授)
- 贵宾: 2.947
- 金币: 39440.5
- 散金: 14624
- 红花: 415
- 帖子: 10637
- 在线: 2546.5小时
- 虫号: 373328
- 注册: 2007-05-16
- 性别: GG
- 专业: 催化化学
- 管辖: 催化
2楼2013-09-05 10:19:04
jiangyun2
荣誉版主 (文坛精英)
小鱼儿
-
专家经验: +6 - C-EPI: 4
- 应助: 156 (高中生)
- 贵宾: 4.608
- 金币: 34926.7
- 散金: 118243
- 红花: 844
- 沙发: 2275
- 帖子: 27803
- 在线: 2629.4小时
- 虫号: 639367
- 注册: 2008-10-28
- 专业: 化学工程及工业化学
- 管辖: 催化
4楼2013-09-06 21:37:09
|
感谢分享！ [ 发自小木虫客户端 ] |
7楼2013-12-02 08:20:52
