Abstract: The invention relates to a manganese (II) complex, its preparation method and use. The structure of the complex is (R1R2R3R4A)2[MnX4], wherein R1, R2, R3 and R4 are identical or different, independently selected from alkyl, aryl, or heteroaryl; said alkyl, aryl, or heteroaryl can be optionally substituted with a substituent, and the substituent is preferably alkyl, aryl or heteroaryl; A is N, P, or As; X is optionally F, Cl, Br, or I. The present invention also relates to an organic light emitting diode, its preparation method and use, wherein the manganese (II) complex of the invention is used as a dopant in the light-emitting layer. The prepared organic light emitting diode exhibits high electrical-to-optical conversion efficiency which can be used for flat-panel displays and illuminations.

Abstract: An ionic phosphorescent metal complex has a formula of formula (I). R1 and R2 are the same or different, and are independently selected from alkyl, aryl and heteroaryl, wherein the alkyl, aryl and heteroaryl are optionally substituted with 1-5 of the following groups: halogen, alkyl, alkoxy, alkylthio, amino, alkylamino, dialkylamino, arylamino, diarylamino, haloalkyl, cyano, nitro, alkenyl, aryl and heteroaryl optionally substituted with 1-3 aryl groups; R3 is independently selected from halogen, alkyl, haloalkyl, alkoxy, alkylthio, amino, alkylamino, dialkylamino, cyano, nitro or alkenyl; M is Cu(I), Ag(I) or Au(I). The organic light-emitting diode prepared by using the phosphorescent metal complex of formula (I) as a dopant for an emissive layer is capable of achieving high-performance organic electroluminescence and is applicable to the fields of lighting and flat-panel display.

Abstract: Provided is an ionic type phosphorescent metal complex with a racemization structure, a preparation method therefor and a use thereof. The structure of the complex is [PtAg2{rac-(PPh2CH2PPhCH2—)2}(C?CR)2(PR?3)2]2+An?2/n or [PtAg2{meso-(PPh2CH2PPhCH2—)2}(C?CR)2(PR?3)(?-X)]+mAm?, wherein R is the same or different and is independently selected from alkyl, aryl, heteroaryl, and heteroaryl aryl; R? is the same or different and is independently selected from alkyl, aryl, and heteroaryl; the alkyl, aryl, and heteroaryl can be substituted by one or more substituents which are selected from alkyl, alkenyl, alkynyl, alkoxy, amino, halogen, halogenated alkyl, and aryl; X is halogen; Am? and An? are monovalent or bivalent anions; and m or n is 1 or 2. The present invention also relates to an organic light emitting diode, a preparation method therefor and use thereof.

Abstract: Pt2M heterotrinuclear metal-organic alkynyl complexes have a structure of formula (I): [Pt2M(?-PR2CH2PRCH2PR2)2(C?CR?)2(C?CR?)2]+mAm?. In formula (I), ? represents a bridging ligand; PR2CH2PRCH2PR2 is a type of tridentate phosphine ligands; the subscript number of each letter represents the number of each group. The complexes present phosphorescent emission, and the color distribution of the emitted light is relatively broad from blue-green to orange-red. The complexes can be used as photoluminescent materials in the fields of displays, lighting, sensors and biomarkers. Among the complexes, Cu complexes also exhibit reversible self-recovery photochromic performance. Under UV irradiation, the complexes change from a colorless or light color state to a dark color state rapidly, and after stopping UV irradiation, they gradually return to the light color state.

Abstract: An ionic phosphorescent metal complex has a formula of [PtM3{(PR?2CH2)3P}(C?CR)(C?CR?)(?-Cl)]2+An?2/n. M is selected from Au(I) and Ag(I). R, R? and R? are identical or different, and are independently selected from alkyl, alkenyl, alkynyl, aryl, and heteroaryl. Each of the alkyl, alkenyl, alkynyl, aryl, and heteroaryl may be substituted with one or more substituents selected from alkyl, alkenyl, alkynyl, alkoxy, amino, halogen, halogenated alkyl, aryl, and heteroaryl. The substituent is optionally further substituted with one or more of the following groups: alkyl, alkenyl, alkynyl, alkoxy, amino, halogen, halogenated alkyl, aryl, and heteroaryl. An? is a monovalent or divalent anion. n is 1 or 2. ?- represents bridging linkage. The organic light-emitting diode prepared by using the complex as the light-emitting layer dopant has an external quantum efficiency of 10% or more, and can be applied to the fields of flat panel display and daily lighting.

Abstract: Pt2M heterotrinuclear metal-organic alkynyl complexes have a structure of formula (I): [Pt2M(?-PR2CH2PRCH2PR2)2(C?CR?)2(C?CR?)2]+mAm?. In formula (I), ? represents a bridging ligand; PR2CH2PRCH2PR2 is a type of tridentate phosphine ligands; the subscript number of each letter represents the number of each group. The complexes present phosphorescent emission, and the color distribution of the emitted light is relatively broad from blue-green to orange-red. The complexes can be used as photoluminescent materials in the fields of displays, lighting, sensors and biomarkers. Among the complexes, Cu complexes also exhibit reversible self-recovery photochromic performance. Under UV irradiation, the complexes change from a colorless or light color state to a dark color state rapidly, and after stopping UV irradiation, they gradually return to the light color state.

Abstract: Provided is an ionic type phosphorescent metal complex with a racemization structure, a preparation method therefor and a use thereof. The structure of the complex is [PtAg2{rac-(PPh2CH2PPhCH2—)2}(C?CR)2(PR?3)2]2+An?2/n or [PtAg2{meso-(PPh2CH2PPhCH2—)2}(C?CR)2(PR?3)(?-X)]+mAm?, wherein R is the same or different and is independently selected from alkyl, aryl, heteroaryl, and heteroaryl aryl; R? is the same or different and is independently selected from alkyl, aryl, and heteroaryl; the alkyl, aryl, and heteroaryl can be substituted by one or more substituents which are selected from alkyl, alkenyl, alkynyl, alkoxy, amino, halogen, halogenated alkyl, and aryl; X is halogen; Am? and An? are monovalent or bivalent anions; and m or n is 1 or 2. The present invention also relates to an organic light emitting diode, a preparation method therefor and use thereof.

Abstract: The invention relates to a manganese (II) complex, its preparation method and use. The structure of the complex is (R1R2R3R4A)2[MnX4], wherein R1, R2, R3 and R4 are identical or different, independently selected from alkyl, aryl, or heteroaryl; said alkyl, aryl, or heteroaryl can be optionally substituted with a substituent, and the substituent is preferably alkyl, aryl or heteroaryl; A is N, P, or As; X is optionally F, Cl, Br, or I. The present invention also relates to an organic light emitting diode, its preparation method and use, wherein the manganese (II) complex of the invention is used as a dopant in the light-emitting layer. The prepared organic light emitting diode exhibits high electrical-to-optical conversion efficiency which can be used for flat-panel displays and illuminations.

Abstract: One variation of a method for controlling access to products from a vending machine includes: locking a door of the vending machine; recording an initial inventory of products arranged within the vending machine based on signals received by a radio antenna arranged within the vending machine and read by a radio frequency identification reader; initiating a transaction in response to receiving a cashless payment mechanism from a patron; unlocking the door in response to authentication of the cashless payment mechanism; in response to closure of the door, recording a final inventory of products within the vending machine based on signals received by the radio antenna and read by the radio frequency identification reader; and initiating a payment with the cashless payment mechanism for a difference between the initial inventory and the final inventory to complete the transaction.

Abstract: One variation of a method for dynamically pricing vended products includes: identifying a purchase pattern of a user at a vending machine; in response to an approaching sell-by date for a unit of a product loaded into the vending machine and based on the purchase pattern, setting a discount rate for the unit of the product for the user; transmitting an electronic communication to an account associated with the user, the electronic communication indicating the discount rate for the unit of the product; identifying the user in a transaction initiated at the vending machine; and in response to selection of the unit of the product from the vending machine during the transaction, initiating a payment with a payment mechanism supplied by the user according to the discount rate.

Abstract: One variation of a method for controlling access to products from a vending machine includes: locking a door of the vending machine; recording an initial inventory of products arranged within the vending machine based on signals received by a radio antenna arranged within the vending machine and read by a radio frequency identification reader; initiating a transaction in response to receiving a cashless payment mechanism from a patron; unlocking the door in response to authentication of the cashless payment mechanism; in response to closure of the door, recording a final inventory of products within the vending machine based on signals received by the radio antenna and read by the radio frequency identification reader; and initiating a payment with the cashless payment mechanism for a difference between the initial inventory and the final inventory to complete the transaction.

Abstract: One variation of a method for processing transactions at a vending kiosk includes: at a first time, capturing a pre-transaction image of a shelf arranged within the kiosk with an optical sensor; in response to receiving payment information from a customer, unlocking a door of the kiosk; at a second time succeeding the first time, capturing a post-transaction image of the shelf with the optical sensor in response to closure of the door; detecting a difference between the pre-transaction image and the post-transaction image; based on the difference, flagging a portion of the pre-transaction image for review by a remote human operator; and, in response to identification of a product type corresponding to the difference by the remote human operator, billing the customer for a cost of the product type according to the payment information.

Abstract: One variation of a method for controlling access to products from a vending machine includes: locking a door of the vending machine; recording an initial inventory of products arranged within the vending machine based on signals received by a radio antenna arranged within the vending machine and read by a radio frequency identification reader; initiating a transaction in response to receiving a cashless payment mechanism from a patron; unlocking the door in response to authentication of the cashless payment mechanism; in response to closure of the door, recording a final inventory of products within the vending machine based on signals received by the radio antenna and read by the radio frequency identification reader; and initiating a payment with the cashless payment mechanism for a difference between the initial inventory and the final inventory to complete the transaction.

Abstract: A security module detects and remediates malware from suspicious hosts. A file arrives at an endpoint from a host. The security module detects the arrival of the file and determines the host from which the file arrived. The security module also determines whether the host is suspicious. If the host is suspicious, the security module observes the operation of the file and identifies a set of files dropped by the received file. The security module monitors the files in the set using heuristics to detect whether any of the files engage in malicious behavior. If a file engages in malicious behavior, the security module responds to the malware detection by remediating the malware, which may include removing system changes caused by the set.

Abstract: One variation of a method for controlling access to products from a vending machine includes: locking a door of the vending machine; recording an initial inventory of products arranged within the vending machine based on signals received by a radio antenna arranged within the vending machine and read by a radio frequency identification reader; initiating a transaction in response to receiving a cashless payment mechanism from a patron; unlocking the door in response to authentication of the cashless payment mechanism; in response to closure of the door, recording a final inventory of products within the vending machine based on signals received by the radio antenna and read by the radio frequency identification reader; and initiating a payment with the cashless payment mechanism for a difference between the initial inventory and the final inventory to complete the transaction.

Abstract: One variation of a method for dynamically pricing vended products includes: identifying a purchase pattern of a user at a vending machine; in response to an approaching sell-by date for a unit of a product loaded into the vending machine and based on the purchase pattern, setting a discount rate for the unit of the product for the user; transmitting an electronic communication to an account associated with the user, the electronic communication indicating the discount rate for the unit of the product; identifying the user in a transaction initiated at the vending machine; and in response to selection of the unit of the product from the vending machine during the transaction, initiating a payment with a payment mechanism supplied by the user according to the discount rate.

Abstract: A security module detects and remediates malware from suspicious hosts. A file arrives at an endpoint from a host. The security module detects the arrival of the file and determines the host from which the file arrived. The security module also determines whether the host is suspicious. If the host is suspicious, the security module observes the operation of the file and identifies a set of files dropped by the received file. The security module monitors the files in the set using heuristics to detect whether any of the files engage in malicious behavior. If a file engages in malicious behavior, the security module responds to the malware detection by remediating the malware, which may include removing system changes caused by the set.