Realizing near white and warm light emission of cuprous iodide complexes by alkyl-isomerization of ligands.

Four novel all-in-one structured cuprous iodide hybrid materials are presented. Isomerization of the alkyl chain on the ligand improved material thermal stability and regulated their luminescence to warm and near-white light emission, with the internal quantum yield increasing from 5% to 83%. This provides a reasonable route for designing white light emitting cuprous iodide materials for solid-state lighting in future.

Recent Progress in Luminescent Cu(I) Halide Complexes: A Mini-Review.

Copper(I) halide complexes are well sought-after materials due to their rich structural diversities and photophysical properties. Profoundly, there is a direct relationship between each structural variation and luminescence of these complexes, for a purported use. In this review, recent publications within the last 2 years about copper(I) halide complexes, centering on their structural dimensionalities with derivatives of nitrogen, phosphorus, and sulfur ligands, have been considered alongside their effects on luminescence.

Selective fluorescent sensing of LMOFs constructed from tri(4-pyridylphenyl)amine ligand.

Three new luminescent metal-organic frameworks (LMOFs), [Zn(tppa)(ndc)] n (1), [Cd(tppa)(oba)] n (2), [Zn2(tppa)(bpdc)2] n (3) (tppa = tri(4-pyridylphenyl)amine, ndc = 1,4-naphthalenedicarboxylic acid, oba = 4,4'-oxydibenzoic acid, bpdc = 4,4'-biphenyldicarboxylic acid) have been synthesized by solvothermal method. Complexes 1 and 2 are 2-D two-fold interpenetrating structures, aligning into a 3-D structure through C-H⋯π stacking interactions, while 3 is a 5-fold interpenetrating three-dimensional structure. The internal quantum yields (IQYs) of complexes 1-3 are 32.7%, 45.7% and 24.0% (λ ex = 365 nm), separately. Furthermore, all the complexes show different luminescence signal changes towards aromatic volatile organic compounds (AVOCs). Complex 1 exhibits a high sensitivity in the detection of both Fe3+ and Cr3+ with large quenching coefficients of K sv 2.57 × 104 M-1 and 2.96 × 104 M-1, respectively. All these results demonstrated potential applications in chemical sensing.

[Postoperative acute renal failure in adult patients with cardiac surgery: evaluation of the RIFLE classification].

OBJECTIVE: To evaluate the ability of the RIFLE classification to predict hospital mortality in adult patients who underwent cardiac surgery. METHODS: From October 1st 2006 to December 31st 2006, five hundred and nine adult patients who underwent coronary artery bypass grafting and/or valve operation were enrolled in this study. Renal function was assessed daily according to the RIFLE classification, meanwhile, APACHE II score and SOFA score were also evaluated, as well as the maximum scores were recorded. RESULTS: Mean duration of ventilation support was 18 (14-19) hours, the time of ICU stay was 1.4 +/- 1.0 days, and the time of postoperative hospital stay was 12.0 (10.0-15.0) days. 167 patients (32.8%) incurred postoperative ARF according to the RIFLE classification. The overall mortality was 4.3% (22/502). A significant increase (P < 0.01) was observed for mortality based on RIFLE classification. By applying the area under the receiver operating characteristic curve, the RIFLE classification had more powerful discrimination power [0.933, (95% CI 0.872-0.995), P < 0.001]. CONCLUSIONS: ARF is one of the major complications in postcardiotomy patients. Analytical data suggested the good discriminative power of the RIFLE classification for predicting inpatient mortality of adult postoperative patient with ARF, and the RIFLE classification is simple and practically performed. According to the RIFLE classification, patients with RIFLE class I or class F incur a significantly increased risk of in-hospital mortality compared with those who never develop ARF.

[Extracorporeal membrane oxygenation support in acute cardiorespiratory function failure patients after cardiac surgery].

OBJECTIVE: To investigate the treatment experience of extracorporeal membrane oxygenation (ECMO) support after cardiac surgery. METHODS: Retrospectively analyze the clinical data of 117 postoperative patients supported with ECMO in cardiac intensive care unit from March 2005 to June 2008. There were 32 female and 85 male patients, with a mean age of (48.7 +/- 16.5) years old. The cardiac operations included coronary artery bypass grafting (n = 20), coronary artery bypass grafting and remodeling of left ventricle (n = 9), coronary artery bypass grafting and valvular operation (n = 5), repair of ventricular septal perforation following acute myocardial infarction (n = 2), valvular operation (n = 46), heart transplantation (n = 20), lung heart transplantation and repair of ventricular septal defect (n = 1), correction of congenital heart defects (n = 10), aortic operations (n = 4). Venoarterial bypass was instituted in 115 for hemodynamic failure and venovenous in 2 patient for hypoxemia following cardiac surgery. ECMO was established in 110 patients by cannulation of the right atrium and femoral artery, and 5 of the right atrium and ascending aorta. And 2 case added left atrial drainage to ECMO. Heparin was infused to maintain the whole blood activated coagulation time (ACT) of 160 to 200 s in centrifugal pump (14 cases), and 200 to 250 s in roller pump (3 cases) to avoid thrombotic events. This was administered until decannulation. Intra-aortic balloon pump was used in 15 patients and continuous renal replacement therapy in 29 cases. RESULTS: Mean ECMO duration was 61 h (ranged 3 to 225 h) and the mean duration of ICU stay was 5 d. 87 patients (74.4%) were successfully weaned from ECMO. 69 patients (59.0%) survived to discharge. The most common complications were re-exploration for bleeding (n = 24) and alimentary tract hemorrhage (n = 14), renal failure required renal replacement therapy (n = 29), infection(n = 32), limb ischemia (n = 5), plasma leak of oxygenators (n = 29), hemolysis (n = 7), neurological complication (n = 4). CONCLUSIONS: ECMO is an effective mechanical assistance method for short-term treatment of postoperative cardiorespiratory failure. Indication should be controlled strictly. Earlier institution of ECMO and prevent complication may improve outcome.

[Acute hemodynamic effects of intravenous diltiazem in patients with congenital heart defects and pulmonary hypertension post cardiac surgery].

OBJECTIVE: To observe the acute hemodynamic effects of intravenous diltiazem in patients with congenital heart defect (CHD) and severe pulmonary hypertension (HP) post cardiac surgery. METHODS: From November 2003 to September 2005, 12 patients with CHD and severe HP (4 male, mean age 17.8 +/- 9.8 years) after cardiac surgery received intravenous diltiazem (3 - 5 microg x kg(-1) x min(-1)) in the Intensive Care Unit. Mean pulmonary artery pressure (mPAP), mean arterial pressure (MAP), heart rate (HR), stroke volume (SV), systemic vascular resistance (SVR), pulmonary vascular resistance (PVR) were monitored with Swan-Ganz catheter before (T1) and 6 hours (T2) after diltiazem injection, before weaning patients off of ventilator (T3), 1 hour (T4) and 24 hour (T5) after extubation. RESULTS: All patients survived during the observation period and no patient developed pulmonary hypertension crisis. The average ventilation time was (88.7 +/- 50.1) hours. Mean ICU stay time was (5.8 +/- 3.1) days. Compared to T1, mPAP was significantly decreased at T3 and T5, MAP significantly increased at T4 and T5, HR significantly reduced at T2 and thereafter, SV significantly increased at T3, T4 and T5 and PVR significantly increased at T3 and T5 while SVR remained unchanged after diltiazem therapy. CONCLUSION: Intravenous use of diltiazem is safe and effective for patients with CHD with severe HP post cardiac surgery.