用于X射线成像的联萘酚二酰亚胺闪烁体
Binaphthol diimide scintillators for X-ray imaging
陈静茹 1刘光胜 2陈福海 2陈勇 2方昕 2陈鸿铭 3林梅金1
作者信息
- 1. College of Chemistry,Fuzhou University,Fuzhou 350116,China;College of Materials Science and Engineering,Fuzhou University,Fuzhou 350116,China
- 2. College of Chemistry,Fuzhou University,Fuzhou,350116,China
- 3. College of Materials Science and Engineering,Fuzhou University,Fuzhou,350116,China
- 折叠
摘要
稠环二酰亚胺是一类具有突出光学性能和光电应用潜力的有机染料.本文聚焦本课题组新近开发的1,1'-双(2-萘酚-4,5-二酰亚胺)(BiND-OH)及其苯基/甲基衍生物BiND-OPh和BiND-OMe,详细研究其晶体堆积与X射线发光性能之间的构效关系,并对其X射线成像进行研究.单晶X射线衍射结果表明,BiND-OH通过分子间氢键形成两个互锁的紧密结构,导致其辐射发光性能差.相反,BiND-OPh和BiND-OMe的辐射发光强度则提高了约73倍和537倍,这主要是因为两者对分子间氢键的破坏以及以π-π作用诱导的J聚集堆积.其中,BiND-OMe具有最优异的X射线发光性能还与其较大的π-π平面距离、更长的滑移距离以及较小的π平面重叠区域等因素有关;将其用于X射线成像,检测限低至70.68 nGy s-1,衰减时间短至4.37 ns,可实现11.0 lp mm-1的空间分辨率.这一发现为了解分子结构和聚集状态对有机闪烁特性的内在影响提供了宝贵的见解.
Abstract
Rylene diimides are an attractive class of organic dyes owing to their exceptional optical properties and opto-electronic applications.Herein,we extend their applications to the realm of X-ray imaging.The emissive 1,1'-bi(2-naphthol-4,5-dicarboximide)(BiND-OH)and its phenyl/methyl deri-vatives,BiND-OPh and BiND-OMe,have been selected to investigate the structure-activity relationships between their crystal packing and X-ray scintillation properties.Single crystal X-ray diffraction results indicate that BiND-OH forms a tightly structured conformation with two interlocks by hy-drogen bonding,leading to a charge transfer state and re-sulting in nearly non-scintillation.In contrast,the radioluminescence intensities of BiND-OPh and BiND-OMe have increased by about 73 and 537 times,respectively,owing to the disruption of hydrogen bonding control and the for-mation of a J-aggregation fraction dominated by π-π inter-actions.Remarkably,BiND-OMe displays superior scintillation properties,marked by reduced non-radiative transitions,attributed to greater π-π plane distances,extended slip distances,and diminished π-plane overlap areas.It de-monstrates a low detection limit of 70.68 nGy s-1 and a short decay time of 4.37 ns.When applied to X-ray imaging,it produces a high spatial resolution of 11.0 lp mm-1.This finding provides valuable insights into the profound impact of molecular structure and aggregation state on the organic scintillation properties.
关键词
organic scintillators/molecular structures/crystal packing/fluorescence/X-ray imagingKey words
organic scintillators/molecular structures/crystal packing/fluorescence/X-ray imaging引用本文复制引用
基金项目
National Natural Science Foundation of China(22201042)
National Natural Science Foundation of China(22371047)
Natural Science Foundation of Fujian Province(2022J05118)
Natural Science Foundation of Fujian Province(2022J01538)
Natural Science Foundation of Fujian Province(2023J01425)
Collaborative Innovation Platform Project of Fu-Xia-Quan National Independent Innovation Demonstration Zone(2022-P-021)
Fuzhou Science and Technology(2022-P-001)
出版年
2024
NETL
NSTL
万方数据