Synthesis and characterization of metal complexes with various luminescent properties = 다양한 발광 특성을 가지는 금속 화합물의 합성 및 특성 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 389
  • Download : 0
The heteroleptic Ir(III) ($\textbf{1}$) and Pt(II) ($\textbf{2}$) complexes containing the short conjugation length ligand of 2-benzylpyridine and 2,4-pentanedione were synthesized and their luminescent properties were studied. They showed green (530 nm) and blue (430 nm) phosphorescence, respectively. The platinum complex is 56 nm blue-shifted than Pt(ppy)(acac). In the devices of ITO / CuPC / α-NPD / 6% $\textbf{2}$ : mCP / BCP / Alq3 / Cathode, the EL efficiency is comparatively low due to probably the inefficient carrier transfer from host (mCP) to dopant. A novel iridium-platinum heterodinuclear complex $[Ir(ppyFF)_2](\mu_2- \textbf{L})[Pt(ppy)]$ ($\textbf{5}$) [ppyFF = 2-(2,4-difluorophenyl)-pyridine, ppy = 2-phenylpyridine, $\textbf{L}$ = 1,3-bis(3-phenyl-3-oxopropanoyl)benzene dianion] was prepared to investigate the photophysical, electrochemical, and photoinduced energy transfer properties. The properties of iridium mononuclear complex $Ir(ppyFF)_2(H\textbf{L})$ ($\textbf{3}$), homodinuclear complex $[Ir(ppyFF)_2]_2(\mu_2- \textbf{L})$ (4) and reference mononuclear complexes bearing DBM ligand (DBM = dibenzoylmethane), $Ir(ppyFF)_2(DBM)$ ($\textbf{1}$) and Pt(ppy)(DBM) ($\textbf{2}$), were also compared. The absorption spectrum of 5 is found to be the sum of the independent spectra of $\textbf{1}$ and $\textbf{2}$, indicating independent light absorption in each metal-centered moiety in $\textbf{5}$. Complex $\textbf{5}$ exhibits orange-red emission at room temperature and 77 K, which turned out to be originated from $^3LC$ states of the $\textbf{L}$ bridging ligand. It is revealed that both the high energy $Ir(ppyFF)_2$ and Pt(ppy) moieties act as energy donors when linked to the lower energy $\textbf{L}$ bridging ligand, affording an effective energy transfer to the bridging ligand. The electrochemical properties of $\textbf{5}$ indicate that reductions occur on the outside ligand of each metal moiety and the inner bridging ligand, whereas oxidat...
Advisors
Do, Young-Kyuresearcher도영규researcher
Description
한국과학기술원 : 화학과,
Publisher
한국과학기술원
Issue Date
2009
Identifier
309364/325007  / 020035159
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 화학과, 2009.2, [ xi, 142 p. ]

Keywords

luminescence; photoluminescence; electroluminescence; mechanoluminescence; 발광; 광발광; 전기발광; 역학광; luminescence; photoluminescence; electroluminescence; mechanoluminescence; 발광; 광발광; 전기발광; 역학광

URI
http://hdl.handle.net/10203/31713
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=309364&flag=dissertation
Appears in Collection
CH-Theses_Ph.D.(박사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0