The luminescence of trans-[TcO2(L)4]+ (L = pyridine (py) or picoline (pic)) and trans-[TcO2(CN)4]3- at room and low temperature is described and represents the first example of room temperature excited-state luminescence observed for Tc complexes. At room temperature, the complexes exhibited broad luminescence with emission maxima ranging from 745 to 780 nm. Analogous to the Re complexes (emission at 635-655 nm), the low-temperature emission spectra of microcrystalline samples of [TcO2(py)4]BPh4 and [TcO2(pic)4]BPh4 display the characteristic progressions of the symmetric O=Tc=O and Tc-L stretching modes. DFT/TDDFT calculations were performed on the trans-[MO2(L)4]+ (M = Re, Tc) congeners and predicted the dioxotechnetium emission to be 0.41 eV lower in energy than its Re analogue. Low-temperature lifetimes (8 K) ranging from 15 to 1926 mus for the series of Tc complexes are consistent with the Re analogues.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/ja054906m | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enhancement of titanium surfaces using different acid solutions at room temperature to improve bone cell responses.
J Dent Sci
January 2025
School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.
Background/purpose: Early osseointegration of titanium (Ti) dental implants relies on the surface topography. Surface modification of Ti seeks to enhance bone regeneration around implants. Acid etching is the simple, less technique sensitive and cost-effective technique for surface treatment.
View Article and Find Full Text PDFChronic cold exposure reprograms feeding-regulated LPL activity in white adipose tissues through hepatic ANGPTL3 and ANGPTL8.
Life Metab
February 2025
Hubei Key Laboratory of Cell Homeostasis, Department of Biochemistry, College of Life Sciences, TaiKang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei 430072, China.
Graphical Abstract Lipoprotein lipase (LPL) mediates peripheral tissue triglyceride (TG) uptake. Hepatic ANGPTL3 (A3) and ANGPTL8 (A8) form a complex and inhibit LPL activity in the white adipose tissue (WAT) via systematic circulation. ANGPTL4 (A4) is expressed in WAT and inhibits LPL activity locally.
View Article and Find Full Text PDFImpact of Weather and Holidays on Orthopedic Emergency Room Crowding, Fractures, and Polytraumas in a Third-Level Referral Trauma Center in Europe.
Adv Orthop
January 2025
Department of Orthopedics and Trauma Surgery, University of Pisa, Pisa, Italy.
Orthopedic trauma is a significant component of emergency department workloads worldwide. The relationship between weather conditions and injury rates is controversial in modern literature. Even less has been written to investigate bank holidays' influence on contusions, dislocations, fractures, and even polytrauma.
View Article and Find Full Text PDFMetabolomics reveals the effect of vacuum packaging combined with moderate-temperature preservation on quality changes of tender ginger.
Food Chem X
January 2025
College of Food and Biological Engineering, Chengdu University, Chengdu 610106, PR China.
Tender ginger is often used a fresh vegetable but hard to storage due to the delicate skin, high moisture content and prone to spoilage. In order to develop suitable preservation technology for tender ginger, the effects of vacuum packaging combined with different preservation temperatures (20-25 °C room temperature, 4 °C and 10 °C) on tender ginger shelf life were investigated. The results indicated that vacuum packaging combined with 4 °C (VP4) preservation could easily cause cold damage and postharvest physiological fluctuations.
View Article and Find Full Text PDFEffect of ambient conditions in friction surfacing.
Weld World
November 2024
Solid State Materials Processing, Institute of Material and Process Design, Helmholtz-Zentrum Hereon, Geesthacht, Germany.
Friction surfacing (FS) is a solid-state deposition process in which layers are deposited on a substrate surface by frictional heat and severe plastic deformation of a consumable stud material below its melting temperature. Bonding occurs due to accelerated diffusion. The deposition of several layers on top of each other is referred to as multi-layer FS (MLFS), a promising candidate for additive manufacturing (AM) as it offers advantages over fusion-based AM.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!